Season of birth, mixed-handedness, and psychometric schizotypy: Preliminary results from a prospective study

Bolinskey, P. Kevin; Iati, Carina A.; Hunter, Helen K.; Novi, Jonathan H.

doi:10.1016/j.psychres.2012.12.023

Cited by 15 publications

(16 citation statements)

References 36 publications

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“…Eight studies met all inclusion criteria; descriptive information on these reports and the new data (from the independent sample characterized here) can be found in table 1. From the nine data sources included in table 1, an association between winter birth and subclinical psychosis is supported by three studies (Bolinskey, Iati, Hunter, & Novi, 2013;Hori et al, 2012;Tochigi, Nishida, Shimodera, Okazaki, & Sasaki, 2013); one study found increased risk in subjects born during summer (Kirkpatrick, Messias, & LaPorte, 2008), and both the raw new data obtained here (see 2.2.…”

Section: Meta-analysissupporting

confidence: 53%

“…It is worth noticing that all previous reports openly supporting a winter SOB-subclinical psychosis association (Bolinskey et al, 2013;Hori et al, 2012;Tochigi et al, 2013) have been derived from populations with large heterogeneity for such study attributes.…”

Section: Interpretation Of Meta-analytic Results and Literature Reviewmentioning

confidence: 99%

“…First, in the meta-analysis of children, combining studies gave very optimal homogeneity parameters, indicating the association may have held in two independent samples. Secondly, while two adult samples considered in meta-analyses suggested statistically significant winter SOB-psychopathology associations (Bolinskey et al, 2013;Hori et al, association has only seldom been reported. Hence, meta-analytic results with (broad-sense) adult samples (indicating no statistical association) may be somehow realistic.…”

Section: Further Issues and Future Directionsmentioning

confidence: 94%

“…The other five studies reported on adult populations. Whereas the new data and two other studies (Cohen et al, 2011;Hori et al, 2012) analyze relationships between schizotypal personality traits with the SPQ, reports by Bolinskey et al (2013) and Reid et al (2006) were based on the Chapmann Psychosis Proneness Scales (CPPS) (Chapman, Chapman, & Raulin, 1978;Eckblad & Chapman, 1983;Eckblad, Chapman, Chapman, & Mishlove, 1982). Hence, these five studies were first divided into two subsets (schizotypal personality or psychosis proneness) and later combined into a larger 5-study block for comparison.…”

Section: Meta-analysismentioning

confidence: 99%

“…Data from all seven studies included in meta-analyses was introduced as unadjusted effect size estimates (raw ORs). Notably, a cluster of 4 high-quality comprehensive studies (Bolinskey et al, 2013;Breetvelt et al, 2010;Polanczyk et al, 2010;Tochigi et al, 2013) was observed, whose minor drawbacks were mainly in the above-mentioned discussion of results. In contrast, manuscripts by Kirkpatrick et al (2008) and Reid et al (2006) lacked precision in a number of items evaluating their methods (setting, description of participants, variables, data sources, bias, study size or statistics), results and discussion.…”

Section: Meta-analysismentioning

confidence: 99%

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Season of birth and subclinical psychosis: Systematic review and meta-analysis of new and existing data

Córdova‐Palomera

Calati

Arias

et al. 2015

Psychiatry Research

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Season of birth (SOB) has been shown to modify risk for several health outcomes, including a number of neuropsychiatric disorders. Besides, empirical evidence indicates that subclinical forms of psychosis in the general population share some risk factors with categorical diagnoses of psychosis. Hence, by systematically reviewing and meta-analyzing new and existing data, the current work aimed to determine whether there is evidence to support an association between winter SOB and subclinical psychosis in the general population. Meta-analytic results do not indicate an association between winter SOB and schizotypy in adult populations, though additional reports indicate winter SOB may be a risk factor for psychotic experiences or symptoms in children around 12-15 years (children's meta-analysis OR = 1.12, 95% CI: 1.03-1.21). In the whole new dataset of adults (n = 481, mean age = 22.8 years) the association was not detected, neither in an unadjusted model (OR = 0.89, 95% CI: 0.61-1.29, p = 0.526) nor adjusting for gender and age (β=-0.36, t=-0.64, p=0.521). Overall, results indicate the association between winter SOB and increased subclinical psychosis may hold in children, but not in the broad adult general population.Nevertheless, epidemiological and clinicopathological significance of winter SOB as a risk factor for subclinical psychosis will probably be slight due to the small effect sizes indicated by reports available to date.

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Section: Meta-analysissupporting

confidence: 53%

Section: Interpretation Of Meta-analytic Results and Literature Reviewmentioning

confidence: 99%

Section: Further Issues and Future Directionsmentioning

confidence: 94%

Section: Meta-analysismentioning

confidence: 99%

Section: Meta-analysismentioning

confidence: 99%

See 3 more Smart Citations

Season of birth and subclinical psychosis: Systematic review and meta-analysis of new and existing data

Córdova‐Palomera

Calati

Arias

et al. 2015

Psychiatry Research

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Impact of short-term temperature variability on emergency hospital admissions for schizophrenia stratified by season of birth

Zhao

Zhang

et al. 2016

Int J Biometeorol

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Diurnal temperature range (DTR) and temperature change between neighboring days (TCN) are important meteorological indicators closely associated with global climate change. However, up to date, there have been no studies addressing the impacts of both DTR and TCN on emergency hospital admissions for schizophrenia. We conducted a time-series analysis to assess the relationship between temperature variability and daily schizophrenia onset in Hefei, an inland city in southeast China. Daily meteorological data and emergency hospital admissions for schizophrenia from 2005 to 2014 in Hefei were collected. After stratifying by season of birth, Poisson generalized linear regression combined with distributed lag nonlinear model (DLNM) was used to examine the relationship between temperature variability and schizophrenia, adjusting for long-term trend and seasonality, mean temperature, and relative humidity. Our analysis revealed that extreme temperature variability may increase the risk for schizophrenia onset among patients born in spring, while no such association was found in patients born in summer and autumn. In patients born in spring, the relative risks of extremely high DTR comparing the 95th and 99th percentiles with the reference (50th, 10 °C) at 3-day lag were 1.078 (95 % confidence interval (CI) 1.025-1.135) and 1.159 (95 % CI 1.050-1.279), respectively. For TCN effects, only comparing 99th percentile with reference (50th, 0.7 °C) was significantly associated with emergency hospital admissions for schizophrenia (relative risk (RR) 1.111, 95 % CI 1.002-1.231). This study suggested that exposure to extreme temperature variability in short-term may trigger later days of schizophrenia onset for patients born in spring, which may have important implications for developing intervention strategies to prevent large temperature variability exposure.

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Porac

2016

Laterality

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Season of birth, mixed-handedness, and psychometric schizotypy: Preliminary results from a prospective study

Cited by 15 publications

References 36 publications

Season of birth and subclinical psychosis: Systematic review and meta-analysis of new and existing data

Season of birth and subclinical psychosis: Systematic review and meta-analysis of new and existing data

Impact of short-term temperature variability on emergency hospital admissions for schizophrenia stratified by season of birth

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