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. Author manuscript; available in PMC: 2023 Feb 9.
Published in final edited form as: Brain Behav Immun. 2022 Dec 6;108:188–196. doi: 10.1016/j.bbi.2022.12.006

Table 1. Baseline characteristics of the total cohort participating in the age 10 years data collection wave compared to the sub-cohort with child mental health problems and microbiome data.

CBCL at age10 and microbiome Participated in CBCL at age 10 P
N 1,784 5,523
Age, years (mean (SD)) 9.8 (0.29) 9.7 (0.33) <0.001
Sex, girls (%) 48.8 50.1 0.342
BMI, kg/m2 (mean (SD)) 17.2 (2.43) 17.4 (2.55) 0.012
Use of antibiotics, yes (%) 7.3
 Last month (%) 1.2
 1–3 months ago (%) 2.0
 3 months to 1 year ago (%) 4.1
Education level mother at child birth 0.069
 No education (%) 0.1
 Primary education (%) 4.3
 Lower vocational training, intermediate general school (%) 8.2
 >3 years secondary school or vocational training 27.9
 Bachelor’s degree 25.4
 Higher academic education or PhD 29.1
 Missing (%) 5.0 6.0
Country of origin 0.208
 Dutch (%) 66.3 64.4
 Non-Dutch (%) 32.9 34.4
 Missing (%) 0.8 1.2

Continuous data was compared using t-statistics, while categorical data was compared using Chi-square statistics. CBCL: Child Behavior Checklist, the child mental health problems; SD: standard deviation.