Is Birth Method Associated with Sensory Hyperreactivity in Children 3-4 Years in an Upper-Middle-Income Country?
Ann Frances Watkyns, Pamela Joy Gretschel, Helen Buchanan
PMID 38046621WHAT IT FOUND
Children born vaginally had significantly more sensory hyperreactivity than those born by caesarean section.
This contradicts the hypothesis that birth method causes the condition. The finding is likely confounded by socioeconomic status, as most vaginal births occurred in lower-income groups with higher baseline rates of sensory issues.
Key findings
01The prevalence of sensory hyperreactivity was significantly higher in the vaginally born group (29%) compared to the caesarean section group (9%).
02Socioeconomic status was linked to both birth method and sensory outcomes, with 74% of mothers in middle- and low-income groups having a vaginal birth, and sensory hyperreactivity being more common in these groups (24%) than in the high-income group (16%).
03The study authors noted that the higher prevalence of sensory hyperreactivity in the vaginal birth group may be linked to contextual challenges and poverty-related factors rather than the birth method itself.
STILL TO COME
How it was doneWhat they foundWhat it means for OTs
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What it does not show
The sample size was small (91 participants) and the groups were not equally weighted, limiting generalisability. The SSP-2 is standardised on American children. Caregivers in low- and middle-income groups in South Africa experienced significant difficulties understanding the questionnaire due to language, literacy, and cultural relevance, leading to non-standardised administration and adaptations that may have compromised validity. The study is cross-sectional, so it cannot prove causation between birth method and sensory outcomes. Socioeconomic status was strongly confounded with birth method (most VBs were in lower-income groups), making it difficult to separate the effect of birth type from the effect of poverty and environmental stressors. Informal observations of sensory environments were not systematically coded or included in the analysis.
Declared interests
No specific conflicts of interest or funding sources are declared in the provided text.
The easy way to misread this
Do not interpret the higher rate of sensory hyperreactivity in vaginally born children as evidence that vaginal birth causes sensory issues. The authors state this result is likely linked to contextual factors and poverty, as the vaginal birth group was predominantly lower-income, where sensory difficulties were already more prevalent regardless of birth method.