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Table 2 Prevalence and prevalence rate ratios of potential mental health problems.in adulthood by borderline intellectual functioning status and age (only childhood adversity imputed).

From: Association of Borderline Intellectual Functioning and Adverse Childhood Experience with adult psychiatric morbidity. Findings from a British birth cohort

 

Age 26

Age 30

Age 34

Age 42

Borderline intellectual functioning prevalence (with 95% CI)

17.0% (14.5–19.8%)

16.7% (14.5–19.8%)

19.6% (17.2–22.2%)

22.0% (19.3–25.0%)

Higher estimated IQ prevalence (with 95% CI)

12.7% (11.9–13.5%)

11.6% (10.9–12.3%)

14.4% (13.6–15.2%)

17.6% (16.6–18.5%)

Model 1: Unadjusted prevalence rate ratio (with 95% CI)

1.34 (1.13–1.59)

1.44 (1.25–1.66)

1.36 (1.18–1.57)

1.26 (1.09–1.45)

P value

< 0.01

< 0.001

< 0.001

< 0.01

Model 2: Prevalence rate ratio adjusted for participant gender

1.37 (1.16–1.61)

1.45 (1.26–1.68)

1.38 (1.20–1.59)

1.26 (1.09–1.45)

P value

< 0.001

< 0.001

< 0.001

< 0.01

Model 3: Prevalence rate ratio adjusted for participant gender and exposure to childhood adversities

1.12 (0.94–1.32)

1.21 (1.04–1.40)

1.17 (1.01–1.35)

1.10 (0.95–1.27)

P value

n.s.

< 0.05

< 0.05

n.s.

Model 4: Significance of BIF status by childhood adversities associated with material and/or social deprivation

n.s

n.s

n.s

n.s

  1. Notes: CI = Confidence interval, n.s. = not significant at alpha p < 0.05