Last data update: Mar 17, 2025. (Total: 48910 publications since 2009)
Records 1-18 (of 18 Records) |
Query Trace: Thorsen V[original query] |
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Meeting men where they are: Motivators and barriers to accessing health services through a men's mobile wellness clinic, October 2019 to March 2020, Blantyre, Malawi
Nyangulu M , Aholou T , Thorsen V , Ebrahim S , Nkhoma E , Payesa C , Chipungu G , Kalua M , van 't Pad Bosch J , Gibson H , Buie V , Sindani F , Dale H , Behel S , Hassan R , Maida A , Grabbe K . J Epidemiol Glob Health 2024 BACKGROUND: In Malawi approximately, 88.3% people living with HIV are aware of their HIV status. Significant gaps are among men aged 15-34 years; only 72% know their HIV status. To reach men, Jhpiego, in collaboration with the Ministry of Health (MOH), implemented the Men's Mobile Wellness Clinic (MMWC) at workplace settings in Blantyre, Malawi between October 2019 and March 2020. METHODS: We conducted a descriptive qualitative study to understand motivators and barriers to MMWC service uptake by employees and employers. Primary data was drawn from in-depth telephone interviews from four study populations: employers who accepted or declined to host the MMWC at their worksite, and employees who accessed or did not access the services. We performed a thematic analysis using Nvivo 12 software to identify patterns and themes across the dataset. FINDINGS: Main reasons given for using the service among male employees were a desire to know their health status, availability of free health services at the workplace, and good quality services offered by MMWC staff, and support from their supervisor. Men who did not access services stated reasons such as work-clinic scheduling conflicts, lack of adequate promotion of the service, and miscommunication on the criteria about who should attend the MMWC. Employers who accepted to host the MMWC stated convenience and employee's rights to know their health status. Those who declined either stated that employees did not want the services or COVID-19 preventive measures by the MOH between October 2019 and March 2020 restricted participation. CONCLUSION: This study underscores the potential utility of MMWC services including HIV testing among men. The desire to know their health status, availability of free MMWC services at the workplace, good quality services offered by MMWC staff, and the endorsement of MMWC by supervisors were main motivators to access the MMWC services. Sensitizing supervisors and employees about the benefits of the MMWC services, strengthening demand creation, and clarifying eligibility are important to facilitate MMWC uptake among men in Malawi. |
Adverse childhood experiences, HIV and sexual risk behaviors - Five sub-Saharan countries, 2018-2020
Kanagasabai U , Thorsen V , Zhu L , Annor FB , Chiang L , McOwen J , Augusto A , Manuel P , Kambona C , Coomer R , Kamagate F , Ramphalla P , Denhard L , Cain M , Hegle J , de Barros RB , Saenz S , Kamami M , Patel P . Child Abuse Negl 2023 106541 BACKGROUND: Adverse childhood experiences (ACEs) have been shown to have negative, lasting effects on health including increasing the likelihood of engaging in sexual risk behaviors. OBJECTIVE: This study aimed to identify associations between exposures to ACEs and sexual risk behaviors and HIV service utilization among young people. PARTICIPANTS AND SETTING: A sample of 8023 sexually active young people (19-24 year olds) from five sub-Saharan African countries participated Violence Against Children and Youth Surveys (VACS). METHODS: Descriptive analysis of demographic variables, individual ACEs, cumulative ACEs, sexual risk behaviors, HIV testing, antiretroviral treatment (ART) and Antenatal Care (ANC) attendance were completed. Bivariate and multivariable logistic regression analyses were conducted to assess the associations between both individual and cumulative ACEs, sexual HIV risk behaviors, and service utilization while controlling for important covariates such as demographic, having ever been pregnant, had an STI, and used contraception. RESULTS: Exposure to three or more ACEs was higher among males (26.1 %) compared to females (21.3 %); p = 0.003. The most prominent sexual risk behavior for females was having sexual partners who were at least 5 years older (45.7 % compared to males 3.7 %; p < 0.0001) whereas in males it was no or infrequent condom use (45.3 % compared to females 30.1 %; p < 0.0001). Males and females exposed to childhood sexual violence had seven and four times the odds of engaging in transactional sex (aOR = 7.34, 95 % CI: [3.5-15.0]) and (aOR =3.75, 95 % CI: [2.3-6.2], respectively. Females exposed to three or more ACEs were four times more likely to engage in transactional sex (aOR = 4.85, 95 %, CI: [1.6-14.4]) compared to those who did not experience any ACEs. Males exposed to three or more ACEs were two times more likely to engage in early sexual debut (aOR = 2.2, 95 % CI: [1.3-3.4]),]) compared to those who did not experience any ACEs. Females who had witnessed IPV or violence in the community had significantly higher odds of getting tested for HIV (aOR = 2.16, 95 % CI: [1.63-2.87]) and (aOR = 1.36, 95 % CI: [1.03-1.81]), respectively. CONCLUSIONS: This study demonstrated that experiencing ACEs during childhood is associated with higher HIV risk behaviors in sub-Saharan Africa (SSA) with unique differences between males and females. |
Parental absence as an adverse childhood experience among young adults in sub-Saharan Africa
Annor FB , Amene EW , Zhu L , Stamatakis C , Picchetti V , Matthews S , Miedema SS , Brown C , Thorsen VC , Manuel P , Gilbert LK , Kambona C , Coomer R , Trika J , Kamuingona R , Dube SR , Massetti GM . Child Abuse Negl 2023 106556 BACKGROUND: Parental absence in childhood has been associated with multiple negative consequences, such as depression and anxiety in young adulthood. OBJECTIVE: To assess whether parental absence for six months or more in childhood is associated with poor mental health and substance use in young adulthood and whether parental absence accounts for additional variance beyond those explained by other adverse childhood experiences (ACEs) among youth in sub-Saharan Africa. PARTICIPANTS AND SETTINGS: We used combined Violence Against Children and Youth Survey (VACS) data from Cote d'Ivoire (2018), Lesotho (2018), Kenya (2019), Namibia (2019), and Mozambique (2019). Analyses were restricted to 18-24-year-olds (n(f) = 7699; n(m) = 2482). METHODS: We used logistic regression to examine sex-stratified relationships between parental absence in childhood (defined as biological mother or father being away for six months or more before age 18) and mental health problems and substance use and whether parental absence explained additional variance beyond those explained by other ACEs. RESULTS: In sub-Saharan Africa, parental absence in childhood was common (30.5 % in females and 25.1 % in males), significantly associated with poor mental health and substance use among females and males and accounted for additional variance beyond those explained by conventional ACEs. For example, after controlling for study covariates and other ACEs, females who experienced any parental absence had 1.52 (95 % CI = 1.02-2.26) higher odds of experiencing moderate/serious psychological distress compared with those who did not. CONCLUSION: The observed association between parental absence and poor mental health suggests that this experience has significant adverse consequences and merits consideration as an ACE. |
Service-seeking behaviors among male victims of violence in five African countries: The effects of positive and adverse childhood experiences
Denhard L , Brown C , Kanagasabai U , Thorsen V , Kambona C , Kamagate F , Ramphalla P , Benevides R , Kamami M , McOwen J , Augusto A , Manuel P , Coomer R , Matthews S , Patel P , Annor FB . Child Abuse Negl 2023 106452 BACKGROUND: Violence against boys and men is widely under-reported. Boys and men face unique and gendered barriers to accessing services following experiences of violence. PARTICIPANTS AND SETTING: The study is a secondary data analysis of five nationally representative population-based Violence Against Children and Youth Surveys (VACS) conducted in Kenya (2019), Côte d'Ivoire (2018), Lesotho (2018), Mozambique (2019), and Namibia (2019). Analysis was limited to males between 18 and 24 years who experienced lifetime physical or sexual violence. OBJECTIVE AND METHODS: We analyzed the association between positive and adverse childhood experiences (PCEs and ACEs), and seeking post-violence services among males using bivariate chi-squared tests and multivariable logistic regression. RESULTS: 8.02 % (5.55-10.50 %) of male victims between the ages of 18 and 24 sought services for any lifetime physical or sexual violence. Witnessing interparental violence and experiencing death of one or both parents were each associated with increased odds of having sought post-violence services (aOR 2.43; 95 % CI: 1.25-4.79; aOR 2.27; 95 % CI: 1.14-4.50), controlling for education, violence frequency, and violence type. High parental monitoring was associated with increased odds of service seeking (aOR 1.79; 95 % CI: 1.02-3.16), while strong father-child relationship was associated with lower odds (aOR 0.45; 95 % CI: 0.23-0.89). CONCLUSION: These findings contribute to limited research on service-seeking behaviors among men and boys. While some parent-youth relationship factors were associated with higher odds of service-seeking, the outcome remained rare. Age and gender-related barriers should be addressed where post-violence care services are offered. |
Reaching youth through faith leaders: Evaluation of the Faith Matters! Initiative
Kanagasabai U , Aholou T , Chevalier MS , Tobias JL , Okuku J , Shiraishi RW , Sheneberger R , Pande YC , Chifuwe C , Mamane LE , Njika G , Obongo C , Thorsen VC . AIDS Educ Prev 2023 35 82-99 Faith leaders can be uniquely positioned to guide and support young people on health issues, particularly HIV/AIDS and sexual violence. Faith Matters!, a 2-day training workshop for faith leaders, was delivered in September 2021 in Zambia. Sixty-six faith leaders completed a questionnaire at baseline, 64 at posttraining, and 59 at 3-month follow-up. Participants' knowledge, beliefs, and comfort communicating about HIV/AIDS and sexual violence were assessed. More faith leaders accurately identified common places where sexual violence occurs at the 3-month point compared to baseline: at church (2 vs. 22, p = .000), the fields (16 vs. 29, p = .004), parties (22 vs. 36, p = .001), and clubs (24 vs. 35, p = .034). More faith leaders stated that they engaged in conversations that supported people living with HIV (48 at baseline vs. 53, p = .049 at 3-month follow-up). These findings can inform future HIV/AIDS initiatives focusing on increasing the capacity among communities of faith. |
Optimising neonatal antiretroviral therapy using raltegravir: a qualitative analysis of healthcare workers' and caregivers' perspectives
Katirayi L , Stecker C , Andifasi P , Mushavi A , Tiwari P , Jakazi C , Maphosa T , Thorsen V , Murandu M , Gombakomba G , Mungati M , Denoeud-Ndam L , Rivadeneira E , Weber R , Hrapcak S . BMJ Paediatr Open 2022 6 (1) Background In 2020, Zimbabwe adopted the WHO's recommendation to use raltegravir (RAL) granule-based regimens for treatment of neonates identified with HIV at the time of birth testing. This study explores the acceptability of RAL granules by caregivers and healthcare workers (HCWs). Methods Interviews were conducted with 15 caregivers and 12 HCWs from 8 health facilities in Zimbabwe participating in the introductory pilot of RAL granules treatment for newborns. Eligible caregivers included those who had administered RAL to their infant and attended either 8th or 28th day of life appointments. Caregivers of neonates recently initiated on RAL were selected through convenience sampling. Eligible HCWs who provided RAL preparation, administration instructions and support to caregivers of neonates on RAL for at least 3 months were recruited from the same facilities as the caregivers. Interview transcripts were coded and thematically analysed. Results Caregivers reported that their babies looked healthier after RAL initiation, with improved skin appearance and weight gain. Some caregivers wanted their child to remain on RAL beyond 28 days instead of switching regimens, as recommended by national guidelines. HCWs observed that RAL granules improved health outcomes compared with other regimens. HCWs reported challenges with caregivers understanding dosing instructions, measuring with a syringe, swirling and not shaking the medicine, discarding unused medication and following the changes in the dosing schedule and amount when RAL was initiated a few days after birth. HCWs stated that adequate counselling and repeat demonstrations were crucial to ensure that caregivers clearly understood RAL dosing and administration instructions. HCWs requested more standardised training targeting nurses with guidance on handling missed doses and clarification on mixing RAL granules with water and not breastmilk. Conclusion While feedback from caregivers and HCWs on RAL implementation was positive, barriers were also noted. Adequate training and sufficient instruction and support for caregivers would help to ensure that RAL granules are prepared, dosed and administered correctly. © Author(s) (or their employer(s)) 2022. |
Culture clash of female Somali adolescents and sexual and reproductive health services in Oslo, Norway
Afroz T , Gele A , Thorsen VC . Eur J Contracept Reprod Health Care 2021 26 (4) 1-7 OBJECTIVE: Culture influences an individual's perception of health needs. The influence of culture also applies to Somali individuals' perception of their sexual and reproductive health (SRH) and uptake of related services. An understanding of female Somali adolescents' SRH needs is vital to achieve inclusive health coverage. No research has, however, been conducted to explore the SRH needs of this population group in Oslo; hence, the aim of this qualitative study was to minimise the knowledge gap. METHODS: Fourteen young women aged 16-20 years were recruited using the snowball technique with purposive sampling. In-depth interviews using a semi-structured interview guide were used to collect data, and thematic analysis was applied. RESULTS: Participants perceived SRH as a very private matter and open discussion of SRH was extremely limited owing to certain Somali cultural beliefs and values. As the participants intend to practise chastity before marriage, they believed that existing SRH services were largely irrelevant and inappropriate. Where they felt the need to access SRH services, participants wished to do so in a way they considered culturally appropriate. CONCLUSION: Somali culture markedly influences individuals' perceptions of SRH services. It is recommended to modify existing SRH services by increasing confidentiality and anonymity in order to take into account the cultural requirements of female Somali adolescents. |
Association between blood spot transforming growth factor-beta and patent ductus arteriosus in extremely low-birth weight infants
Natarajan G , Shankaran S , McDonald SA , Das A , Ehrenkranz RA , Goldberg RN , Stoll BJ , Tyson JE , Higgins RD , Schendel D , Hougaard DM , Skogstrand K , Thorsen P , Carlo WA . Pediatr Cardiol 2013 34 (1) 149-54 Permanent ductal closure involves anatomic remodeling, in which transforming growth factor (TGF)-beta appears to play a role. Our objective was to evaluate the relationship, if any, between blood spot TGF-beta on day 3 and day 7 of life and patent ductus arteriosus (PDA) in extremely low birth weight (ELBW) infants. Prospective observational study involving ELBW infants (n = 968) in the National Institute of Child Health and Human Development Neonatal Research Network who had TGF-beta measured on filter paper spot blood samples using a Luminex assay. Infants with a PDA (n = 493) were significantly more immature, had lower birth weights, and had higher rates of respiratory distress syndrome than those without PDA (n = 475). TGF-beta on days 3 and 7 of life, respectively, were significantly lower among neonates with PDA (median 1,177 pg/ml [range 642-1,896]; median 1,386 pg/ml [range 868-1,913]) compared with others without PDA (median 1,334 pg/ml [range 760-2,064]; median 1,712 pg/ml [range 1,014-2,518 pg/ml]). The significant difference persisted when death or PDA was considered a composite outcome. TGF-beta levels were not significantly different among subgroups of infants with PDA who were not treated (n = 51) versus those who were treated medically (n = 283) or by surgical ligation (n = 159). TGF-beta was not a significant predictor of death or PDA (day 3 odds ratio [OR] 0.99, 95 % confidence interval [CI] 0.83-1.17; day 7 OR 0.88, 95 % CI 0.74-1.04) on adjusted analyses. Our results suggest that blood spot TGF-beta alone is unlikely to be a reliable biomarker of a clinically significant PDA or its responsiveness to treatment. |
Cytokines and posthemorrhagic ventricular dilation in premature infants
Ambalavanan N , Carlo WA , McDonald SA , Das A , Schendel DE , Thorsen P , Hougaard DM , Skogstrand K , Higgins RD . Am J Perinatol 2012 29 (9) 731-740 OBJECTIVE: To determine in extremely low-birth-weight infants if elevated blood interferon-gamma (IFN-gamma), interleukin (IL)-1beta, IL-18, tumor necrosis factor-alpha (TNF-alpha), and transforming growth factor-beta are associated with need for shunt following severe intraventricular hemorrhage (IVH) or with ventricular dilation following milder grades/no IVH. STUDY DESIGN: Whole blood cytokines were measured on postnatal days 1, 3, 7, 14, and 21. Maximum IVH grade in the first 28 days, and shunt surgery or ventricular dilation on subsequent ultrasound (28 days' to 36 weeks' postmenstrual age) were determined. RESULTS: Of 902 infants in the National Institute of Child Health and Human Development Neonatal Research Network Cytokine study who survived to 36 weeks or discharge, 3.1% had shunts. Of the 12% of infants with severe (grade III to IV) IVH, 26% had a shunt associated with elevated TNF-alpha. None of the infants without IVH (69%) or with grade I (12%) or II (7%) IVH received shunts, but 8.4% developed ventricular dilation, associated with lower IFN-gamma and higher IL-18. CONCLUSION: Statistically significant but clinically nondiscriminatory alterations in blood cytokines were noted in infants with severe IVH who received shunts and in those without severe IVH who developed ventricular dilation. Blood cytokines are likely associated with brain injury but may not be clinically useful as biomarkers for white matter damage. |
Cytokines and neurodevelopmental outcomes in extremely low birth weight infants
Carlo WA , McDonald SA , Tyson JE , Stoll BJ , Ehrenkranz RA , Shankaran S , Goldberg RN , Das A , Schendel D , Thorsen P , Skogstrand K , Hougaard DM , Oh W , Laptook AR , Duara S , Fanaroff AA , Donovan EF , Korones SB , Stevenson DK , Papile LA , Finer NN , O'Shea TM , Poindexter BB , Wright LL , Ambalavanan N , Higgins RD . J Pediatr 2011 159 (6) 919-925 e3 OBJECTIVE: To determine if selected pro-inflammatory and anti-inflammatory cytokines and/or mediators of inflammation reported to be related to the development of cerebral palsy (CP) predict neurodevelopmental outcome in extremely low birth weight infants. STUDY DESIGN: Infants with birth weights ≤1000 g (n = 1067) had blood samples collected at birth and on days 3 +/- 1, 7 +/- 1, 14 +/- 3, and 21 +/- 3 to examine the association between cytokines and neurodevelopmental outcomes. The analyses were focused on 5 cytokines (interleukin [IL] 1beta; IL-8; tumor necrosis factor-alpha; regulated upon activation, normal T-cell expressed, and secreted (RANTES); and IL-2) reported to be most predictive of CP in term and late preterm infants. RESULTS: IL-8 was higher on days 0-4 and subsequently in infants who developed CP compared with infants who did not develop CP in both unadjusted and adjusted analyses. Other cytokines (IL-12, IL-17, tumor necrosis factor-beta, soluble IL R alpha, macrophage inflammatory protein 1beta) were found to be altered on days 0-4 in infants who developed CP. CONCLUSIONS: CP in former preterm infants may, in part, have a late perinatal and/or early neonatal inflammatory origin. |
T cell cytokines and the risk of blood stream infection in extremely low birth weight infants
Schelonka RL , Maheshwari A , Carlo WA , Taylor S , Hansen NI , Schendel DE , Thorsen P , Skogstrand K , Hougaard DM , Higgins RD . Cytokine 2011 53 (2) 249-255 Cytokines mediate the host immune response to infectious micro-organisms. The objective of this study was to determine whether immune regulatory interleukins (IL-4, IL-5, IL-6, and IL-10) and inflammatory cytokines (Interferon-gamma [INF-gamma], tumor necrosis factor-beta [TNF-beta], IL-2, and IL-17) are associated with an increased risk of developing blood stream bacterial/fungal infection (BSI) in extremely low birth weight (ELBW) infants. ELBW infants from 17 NICHD Neonatal Research Network centers without early onset sepsis were studied. Cytokines were measured from blood on days 1, 3, 7, 14, and 21 after birth. 996 ELBW infants contributed a minimum of 4080 unique measurements for each cytokine during the five sampling periods. Infants with BSI had lower levels of the inflammatory cytokines IL-17 (p=0.01), and higher levels of the regulatory cytokines, IL-6 (p=0.01) and IL-10 (p<0.001). Higher levels of regulatory cytokines relative to pro-inflammatory cytokines were associated with increased risk of BSI even after adjusting for confounding variables. In ELBW infants, the ratio of immune regulatory cytokines to inflammatory cytokines was associated with development of BSI. Altered maturation of regulatory and inflammatory cytokines may increase the risk of serious infection in this population. |
Maternal infection requiring hospitalization during pregnancy and autism spectrum disorders
Atladottir HO , Thorsen P , Ostergaard L , Schendel DE , Lemcke S , Abdallah M , Parner ET . J Autism Dev Disord 2010 40 (12) 1423-30 Exposure to prenatal infection has been suggested to cause deficiencies in fetal neurodevelopment. In this study we included all children born in Denmark from 1980, through 2005. Diagnoses of autism spectrum disorders (ASDs) and maternal infection were obtained through nationwide registers. Data was analyzed using Cox proportional hazards regression. No association was found between any maternal infection and diagnosis of ASDs in the child when looking at the total period of pregnancy: adjusted hazard ratio = 1.14 (CI: 0.96-1.34). However, admission to hospital due to maternal viral infection in the first trimester and maternal bacterial infection in the second trimester were found to be associated with diagnosis of ASDs in the offspring, adjusted hazard ratio = 2.98 (CI: 1.29-7.15) and adjusted hazard ratio = 1.42 (CI: 1.08-1.87), respectively. Our results support prior hypotheses concerning early prenatal viral infection increasing the risk of ASDs. |
Multiplicity and early gestational age contribute to an increased risk of cerebral palsy from assisted conception: a population-based cohort study
Hvidtjorn D , Grove J , Schendel D , Svaerke C , Schieve LA , Uldall P , Ernst E , Jacobsson B , Thorsen P . Hum Reprod 2010 25 (8) 2115-23 BACKGROUND: This paper assesses the risk of cerebral palsy (CP) in children born after assisted conception compared with children born after natural conception (NC). METHODS: This population based follow-up study included all 588,967 children born in Denmark from 1995 to 2003. Assisted conception was defined as IVF, with or without ICSI, and ovulation induction (OI), with or without subsequent insemination. RESULTS: There were 33 139 (5.6%) children born in Denmark from 1995 to 2003 as a result of assisted conception and through to June 2009, 1146 (0.19%) children received a CP diagnosis. Children born after assisted conception had an increased risk of a CP diagnosis, crude hazard rate ratio (HRR) 1.90 (95% CI: 1.57-2.31) compared with NC children. Divided into IVF and OI children compared with NC children, the risk was HRR 2.34 (95% CI: 1.81-3.01) and HRR 1.55 (95% CI: 1.17-2.06), respectively. When we included the intermediate factors multiplicity and gestational age in multivariate models, the risk of CP in assisted conception disappeared. In general, children with CP born after assisted conception had similar CP subtypes and co-morbidities as children with CP born after NC. CONCLUSION: The risk of CP is increased after both IVF and OI. The increased risk of CP in children born after assisted conception, and in particular IVF, is strongly associated with the high proportion of multiplicity and preterm delivery in these pregnancies. A more widespread use of single embryo transfer warrants consideration to enhance the long-term health of children born after IVF. |
Interrelationship of cytokines, hypothalamic-pituitary-adrenal axis hormones, and psychosocial variables in the prediction of preterm birth
Pearce BD , Grove J , Bonney EA , Bliwise N , Dudley DJ , Schendel DE , Thorsen P . Gynecol Obstet Invest 2010 70 (1) 40-6 BACKGROUND/AIMS: To examine the relationship of biological mediators (cytokines, stress hormones), psychosocial, obstetric history, and demographic factors in the early prediction of preterm birth (PTB) using a comprehensive logistic regression model incorporating diverse risk factors. METHODS: In this prospective case-control study, maternal serum biomarkers were quantified at 9-23 weeks' gestation in 60 women delivering at <37 weeks compared to 123 women delivering at term. Biomarker data were combined with maternal sociodemographic factors and stress data into regression models encompassing 22 preterm risk factors and 1st-order interactions. RESULTS: Among individual biomarkers, we found that macrophage migration inhibitory factor (MIF), interleukin-10, C-reactive protein (CRP), and tumor necrosis factor-alpha were statistically significant predictors of PTB at all cutoff levels tested (75th, 85th, and 90th percentiles). We fit multifactor models for PTB prediction at each biomarker cutoff. Our best models revealed that MIF, CRP, risk-taking behavior, and low educational attainment were consistent predictors of PTB at all biomarker cutoffs. The 75th percentile cutoff yielded the best predicting model with an area under the ROC curve of 0.808 (95% CI 0.743-0.874). CONCLUSION: Our comprehensive models highlight the prominence of behavioral risk factors for PTB and point to MIF as a possible psychobiological mediator. |
Association of hospitalization for infection in childhood with diagnosis of autism spectrum disorders: a Danish cohort study
Atladottir HO , Thorsen P , Schendel DE , Ostergaard L , Lemcke S , Parner ET . Arch Pediatr Adolesc Med 2010 164 (5) 470-7 OBJECTIVE: To investigate the association between hospitalization for infection in the perinatal/neonatal period or childhood and the diagnosis of autism spectrum disorders (ASDs). DESIGN: A population-based cohort study. SETTING: Denmark. PARTICIPANTS: All children born in Denmark from January 1, 1980, through December 31, 2002, comprising a total of 1 418 152 children. EXPOSURE: Infection requiring hospitalization. MAIN OUTCOME MEASURE: The adjusted hazard ratio (HR) for ASDs among children hospitalized for infection compared with other children. RESULTS: A total of 7379 children were diagnosed as having ASDs. Children admitted to the hospital for any infectious disease displayed an increased rate of ASD diagnoses (HR, 1.38 [95% confidence interval, 1.31-1.45]). This association was found to be similar for infectious diseases of bacterial and viral origin. Furthermore, children admitted to the hospital for noninfectious disease also displayed an increased rate of ASD diagnoses (HR, 1.76 [95% confidence interval, 1.68-1.86]), and admissions for infection increased the rate of mental retardation (2.18 [2.06-2.31]). CONCLUSIONS: The association between hospitalization for infection and ASDs observed in this study does not suggest causality because a general association is observed across different infection groups. Also, the association is not specific for infection or for ASDs. We discuss a number of noncausal explanatory models. |
Validity of childhood autism in the Danish Psychiatric Central Register: findings from a cohort sample born 1990-1999
Lauritsen MB , Jorgensen M , Madsen KM , Lemcke S , Toft S , Grove J , Schendel DE , Thorsen P . J Autism Dev Disord 2010 40 (2) 139-48 The purpose of this study was to assess the validity of the diagnosis of childhood autism in the Danish Psychiatric Central Register (DPCR) by reviewing medical records from 499 of 504 total children with childhood autism born 1990-1999. Based on review of abstracted behaviors recorded in case records from child psychiatric hospitals, case status determination was performed using a standardized coding scheme. In 499 children diagnosed with childhood autism in the DPCR, the diagnosis could be confirmed in 469 children (94%). Of the 30 non-confirmed cases, five were classified by the reviewers as non-autistic cases and the remaining 25 cases were either classified with another ASD diagnosis or the specific diagnosis was not possible to determine. |
Perinatal systemic inflammatory response syndrome and retinopathy of prematurity
Sood BG , Madan A , Saha S , Schendel D , Thorsen P , Skogstrand K , Hougaard D , Shankaran S , Carlo W , NICHD Neonatal Research Network . Pediatr Res 2009 67 (4) 394-400 Fetal and neonatal inflammation is associated with several morbidities of prematurity. Its relationship to retinopathy of prematurity (ROP) has not been investigated. Our objective was to determine the relationship between cytokine levels and ROP in the first three postnatal weeks. Data for this study were derived from the NICHD Cytokine Study. Dried blood spots were obtained from infants <1000g on days 0-1, 3+/-1, 7+/-2, 14+/-3, and 21+/-3. Infants were classified into three groups -- No, Mild, and Severe ROP. Multiplex Luminex assay was used to quantify 20 cytokines. Temporal profiles of cytokines were evaluated using mixed effects models after controlling for covariates. Of 1074 infants enrolled, 890 were examined for ROP and 877 included in the analysis. ROP was associated with several clinical characteristics on unadjusted analyses. Eight cytokines remained significantly different across ROP groups in adjusted analyses. IL-6 and IL-17 showed significant effects in early time periods (D0-3); TGF-beta, brain derived neurotrophic factor (BDNF), and regulated upon activation, normal T cell expressed and secreted (RANTES) in later time periods (D7-21) and IL-18, C-reactive protein (CRP) and neurotrophin-4 (NT-4) in both early and later time periods. We conclude that perinatal inflammation may be involved in the pathogenesis of ROP. |
Validation of self-reported data on assisted conception in the Danish National Birth Cohort
Hvidtjorn D , Grove J , Schendel D , Schieve LA , Ernst E , Olsen J , Thorsen P . Hum Reprod 2009 24 (9) 2332-40 BACKGROUND: An increasing number of children are born after assisted conception and in surveillance programmes information on mode of conception is often achieved via maternal self-report. We assessed the validity of self-reported assisted conception in The Danish National Birth Cohort (DNBC), a prospective pregnancy cohort. Here, the term assisted conception refers to IVF, ICSI, ovulation induction and insemination. METHODS: We compared self-reported assisted conception in the DNBC to corresponding data from Danish national registers; the IVF Register and Danish Drug Prescription Register, providing method of conception in the entire population. In the DNBC, 101,042 women accepted the invitation in early pregnancy from 1996 to 2002. Our final study population comprised 88,151 DNBC women aged 20 years and older who participated in the first DNBC interview with a pregnancy resulting in a live born child. RESULTS: In the DNBC, assisted conception was reported with a sensitivity of 83% and positive predictive value of 88%. Misclassification was largely explained by ambiguous phrasing of the DNBC interview question and interview skip patterns. Women with false negative reporting were more often multipara (P < 0.001) and older (P = 0.027 for IVF/ICSI and P = 0.002 for ovulation induction). The risk ratio (RR) for being born preterm in IVF/ICSI children was lower for children identified via the DNBC, RR 3.61 (95% confidence interval (CI) 3.31-3.94), than the IVF Register, RR 4.36 (95% CI 4.02-4.74). CONCLUSIONS: There was a high positive predictive value of self-reported assisted conception in the DNBC, but the structure of the DNBC interview represented a problem and misclassification could introduce bias. |
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