Table 2.

Incidence rate ratios of mental disorder as a function of age, gender and socioeconomic status (Poisson regressions of incidence rates with gender # SES interaction)

	Any disorder	ADHD	Conduct disorders	Anxiety	Depression	Substance use	Psychosis and personality	Eating disorders	Self-harm
Age IRR	1.09	1.00	0.99	1.16	1.10	1.23	1.12	1.05	1.16
CI (p)	1.09–1.09 (< 0.001)	1.00–1.01 (< 0.001)	0.99–0.99 (< 0.001)	1.16–1.16 (< 0.001)	1.09–1.10 (< 0.001)	1.22–1.23 (< 0.001)	1.11–1.12 (< 0.001)	1.04–1.05 (< 0.001)	1.15–1.17 (< 0.001)
Female # high SES IRR	Reference	Reference	Reference	Reference	Reference	Reference	Reference	Reference	Reference
Female # medium SES IRR	1.06	0.75	0.91	1.14	1.29	1.46	1.18	0.95	1.31
CI (p)	1.04–1.08 (< 0.001)	0.70–0.79 (< 0.001)	0.88–0.95 (< 0.001)	1.10–1.17 (< 0.001)	1.18–1.42 (< 0.001)	1.37–1.54 (< 0.001)	1.05–1.33 (0.006)	0.88–1.02 (0.148)	1.03–1.65 (0.025)
Female) # SES (low) IRR	1.72	0.81	1.76	1.96	2.70	2.82	4.22	1.11	3.50
CI (p)	1.64–1.79 (< 0.001)	0.69–0.96 (0.017)	1.62–1.92 (< 0.001)	1.84–2.08 (< 0.001)	2.29–3.19 (< 0.001)	2.56–3.12 (< 0.001)	3.53–5.05 (< 0.001)	0.92–1.34 (0.265)	2.41–5.08 (< 0.001)
Male # high SES IRR	1.22	2.57	1.54	0.65	1.69	1.28	1.40	0.48	0.60
CI (p)	1.19–1.25 (< 0.001)	2.43–2.71 (< 0.001)	1.48–1.60 (< 0.001)	0.63–0.68 (< 0.001)	1.53–1.87 (< 0.001)	1.20–1.37 (< 0.001)	1.23–1.60 (< 0.001)	0.43–0.53 (< 0.001)	0.44–0.83 (0.002)
Male # medium SES IRR	1.15	2.12	1.50	0.70	1.65	1.98	2.10	0.34	0.74
CI (p)	1.13–1.18 (< 0.001)	2.01–2.23 (< 0.001)	1.44–1.56 (< 0.001)	0.67–0.72 (< 0.001)	1.51–1.81 (< 0.001)	1.87–2.09 (< 0.001)	1.87–2.35 (< 0.001)	0.31–0.37 (< 0.001)	0.57–0.95 (0.020)
Male # low SES IRR	2.44	2.72	3.45	1.45	7.22	5.26	10.20	0.92	5.86
CI (p)	2.34–2.55 (< 0.001)	2.45–3.03 (< 0.001)	3.21–3.69 (< 0.001)	1.34–1.56 (< 0.001)	6.34–8.22 (< 0.001)	4.79–5.77 (< 0.001)	8.78–11.85 (< 0.001)	0.74–1.14 (0.449)	4.14–8.30 (< 0.001)

SES socioeconomic status, IRR incidence rate ratio, CI 95% confidence intervals, ADHD attention deficit hyperactivity disorder