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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 26Age 30Age 34Age 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 gender1.37 (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 adversities1.12 (0.94–1.32)1.21 (1.04–1.40)1.17 (1.01–1.35)1.10 (0.95–1.27)
P valuen.s.< 0.05< 0.05n.s.
Model 4: Significance of BIF status by childhood adversities associated with material and/or social deprivationn.sn.sn.sn.s
  1. Notes: CI = Confidence interval, n.s. = not significant at alpha p < 0.05