TABLE 6.

The association between symptoms of depression and different levels of school absence (divided into quartiles).

	2nd quartile		3rd quartile		4th quartile
	RRR (95% CI)	p-Value	RRR (95% CI)	p-Value	RRR (95% CI)	p-Value
Model 1
Depression	1.11 (1.03–1.20)	0.004	1.22 (1.14–1.31)	<0.001	1.41 (1.33–1.51)	<0.001
ADHD	1.07 (1.00–1.14)	0.044	1.21 (1.13–1.29)	<0.001	1.46 (1.37–1.55)	<0.001
Conduct problems	1.13 (1.05–1.22)	0.001	1.21 (1.12–1.30)	<0.001	1.37 (1.28–1.47)	<0.001
Model 2
Depression	1.09 (1.01–1.19)	0.028	1.13 (1.04–1.23)	0.003	1.24 (1.15–1.34)	<0.001
ADHD	1.03 (0.95–1.11)	0.509	1.12 (1.03–1.21)	0.006	1.30 (1.20–1.40)	<0.001
Conduct problems	1.10 (1.02–1.19)	0.019	1.16 (1.07–1.25)	<0.001	1.26 (1.18–1.36)	<0.001
Age	1.23 (1.13–1.34)	<0.001	1.43 (1.31–1.55)	<0.001	1.74 (1.60–1.89)	<0.001
Gender	1.23 (1.07–1.41)	0.001	1.38 (1.20–1.59)	<0.001	1.72 (1.49–1.98)	<0.001

RRR, relative risk ratio. School absence divided into quartiles, with the 1st quartile as the reference group. Model 1: adjusted for age, gender, and parental education, Model 2: symptoms of depression, ADHD, and conduct problems are entered concurrently and adjusted for the same covariates as in model 1. For gender, boy is set as reference.