Agnieszka Butwicka
Biographic Data
| ID | 9507750 |
|---|---|
| NAME | Agnieszka Butwicka |
| GIVEN NAMES | Agnieszka |
| FAMILY NAME | Butwicka |
| SIGNATURE | BUTWICKA A |
| AFFILIATIONS | Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden |
| ORCID | 0000-0002-7247-2141 |
| VERIFIED | Yes |
| TOTAL WORKS | 7 |
| TOTAL CITATIONS | 0 |
| AUTHOR COUNT | 7 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2021 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 0 |
Sex differences in psychiatric diagnoses preceding autism diagnosis and their stability post autism diagnosis
Background Autistic individuals often receive psychiatric diagnoses prior to their autism diagnosis. It remains unclear to what extent autistic females and males differ in their likelihood of receiving psychiatric diagnoses prior to their autism diagnosis and continue seeking care for them after an autism diagnosis. Methods In a nationwide cohort of all individuals born in Sweden 1990–2015 with a clinical autism diagnosis ( N = 72,331, n females …
Age effects on autism heritability and etiological stability of autistic traits
BACKGROUND: Autism and autistic traits onset in childhood but persist into adulthood. Little is known about how genetic and environmental factors influence autism and autistic traits into adulthood. We aimed to determine age effects on the heritability of clinically diagnosed autism and the etiological stability of autistic traits from childhood to adulthood using twin methods. METHODS: From 23,849 twin pairs in the Swedish Twin Register born bet…
A twin study of genetic and environmental contributions to attention‐deficit/hyperactivity disorder over time
BACKGROUND: Attention-deficit/hyperactivity disorder (ADHD) is an increasingly commonly diagnosed neurodevelopmental condition. One possibility is that this reflects a genuine increase in the prevalence of ADHD due to secular environmental changes, yet this hypothesis remains untested. We therefore investigated whether the genetic and environmental variance underlying ADHD, and traits of ADHD, has changed over time. METHODS: We identified twins b…
Melatonin use and the risk of self‐harm and unintentional injuries in youths with and without psychiatric disorders
BACKGROUND: Sleep disorders in youth have been associated with increased risks of injury, including suicidal behavior. This study investigated whether melatonin, which is the most common medication for sleep disturbances in youth in Sweden, is associated with a decreased risk of injury. METHODS: This population-based cohort study included 25,575 youths who initiated melatonin treatment between ages 6 and 18. Poisson regression was used to estimat…
Familial risk and heritability of intellectual disability
BACKGROUND: Intellectual disability (ID) aggregates in families, but factors affecting individual risk and heritability estimates remain unknown. METHODS: A population-based family cohort study of 4,165,785 individuals born 1973-2013 in Sweden, including 37,787 ID individuals and their relatives. The relative risks (RR) of ID with 95% confidence intervals (95% CI) were obtained from stratified Cox proportional-hazards models. Relatives of ID indi…
Etiological links between autism and difficulties in initiating and maintaining sleep
BACKGROUND: Difficulties initiating and maintaining sleep (DIMS) are frequent features of autism, yet little is known about why these conditions co-occur. One possibility is that they share etiological factors, yet this hypothesis remains to be tested using quantitative genetic designs. We thus investigated etiological links between autism and DIMS using familial co-aggregation and twin methods. METHODS: Twins, siblings, half-siblings, and cousin…
Familial and genetic associations between autism spectrum disorder and other neurodevelopmental and psychiatric disorders
Background Familial and genetic associations between autism spectrum disorder (ASD) and other neurodevelopmental and psychiatric disorders have been reported, sometimes with conflicting results. We estimated familial and genetic associations between ASD and nine disorder groups, and explored differences in these associations for ASD in the context of intellectual disability, epilepsy, chromosomal abnormalities, and congenital malformations. Metho…
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Familial and genetic associations between autism spectrum disorder and other neurodevelopmental and psychiatric disorders
Background Familial and genetic associations between autism spectrum disorder (ASD) and other neurodevelopmental and psychiatric disorders have been reported, sometimes with conflicting results. We estimated familial and genetic associations between ASD and nine disorder groups, and explored differences in these associations for ASD in the context of intellectual disability, epilepsy, chromosomal abnormalities, and congenital malformations. Metho…
Familial risk and heritability of intellectual disability
BACKGROUND: Intellectual disability (ID) aggregates in families, but factors affecting individual risk and heritability estimates remain unknown. METHODS: A population-based family cohort study of 4,165,785 individuals born 1973-2013 in Sweden, including 37,787 ID individuals and their relatives. The relative risks (RR) of ID with 95% confidence intervals (95% CI) were obtained from stratified Cox proportional-hazards models. Relatives of ID indi…
Etiological links between autism and difficulties in initiating and maintaining sleep
BACKGROUND: Difficulties initiating and maintaining sleep (DIMS) are frequent features of autism, yet little is known about why these conditions co-occur. One possibility is that they share etiological factors, yet this hypothesis remains to be tested using quantitative genetic designs. We thus investigated etiological links between autism and DIMS using familial co-aggregation and twin methods. METHODS: Twins, siblings, half-siblings, and cousin…
A twin study of genetic and environmental contributions to attention‐deficit/hyperactivity disorder over time
BACKGROUND: Attention-deficit/hyperactivity disorder (ADHD) is an increasingly commonly diagnosed neurodevelopmental condition. One possibility is that this reflects a genuine increase in the prevalence of ADHD due to secular environmental changes, yet this hypothesis remains untested. We therefore investigated whether the genetic and environmental variance underlying ADHD, and traits of ADHD, has changed over time. METHODS: We identified twins b…
Melatonin use and the risk of self‐harm and unintentional injuries in youths with and without psychiatric disorders
BACKGROUND: Sleep disorders in youth have been associated with increased risks of injury, including suicidal behavior. This study investigated whether melatonin, which is the most common medication for sleep disturbances in youth in Sweden, is associated with a decreased risk of injury. METHODS: This population-based cohort study included 25,575 youths who initiated melatonin treatment between ages 6 and 18. Poisson regression was used to estimat…
Age effects on autism heritability and etiological stability of autistic traits
BACKGROUND: Autism and autistic traits onset in childhood but persist into adulthood. Little is known about how genetic and environmental factors influence autism and autistic traits into adulthood. We aimed to determine age effects on the heritability of clinically diagnosed autism and the etiological stability of autistic traits from childhood to adulthood using twin methods. METHODS: From 23,849 twin pairs in the Swedish Twin Register born bet…
Sex differences in psychiatric diagnoses preceding autism diagnosis and their stability post autism diagnosis
Background Autistic individuals often receive psychiatric diagnoses prior to their autism diagnosis. It remains unclear to what extent autistic females and males differ in their likelihood of receiving psychiatric diagnoses prior to their autism diagnosis and continue seeking care for them after an autism diagnosis. Methods In a nationwide cohort of all individuals born in Sweden 1990–2015 with a clinical autism diagnosis ( N = 72,331, n females …
Psychology (7 works) · Psychiatry (6 works) · Medicine (5 works) · Autism (4 works) · Autism Spectrum Disorder Research (4 works) · Clinical Psychology (4 works) · Genetics (4 works) · Genetics (4 works) · Heritability (4 works) · Twin study (4 works)