Teachers’ working time as a risk factor for their mental health - findings from a cross-sectional study at German upper-level secondary schools

Table 3 Main effects of the covariates on the weekly working time (WWT) of full-time teachers (n = 6,109)

Variables	WWT Online Questionnaire M ± SD [h]	WWT Online Protocol M ± SD [h]	F-value	p-value	η²_partial
	42.8 ± 8.1	45.2 ± 8.7	51.50	0.001	0.017
Covariates
Sex			40.39	<0.001	0.007
Age group			42.15	<0.001	0.007
Subject profile			7.96	0.005	0.001
Interaction effects
Method * sex			8.51	0.001	0.003
Method * age group			3.62	0.027	0.001
Method * subject profile			4.04	0.018	0.001

Notes: M ± SD mean ± standard deviation. Online Protocol: mean of illness-free weeks. General linear model with measurement repetition; internal subject design: method; design: constant term + sex + age group + subject profile; test variable: F-value; df = 2; error def = 6,104; p-value: significance (two-sided); η²_partial: partial eta square (effect size): 0.010 - 0.060 = small effect, <0.010 = none effect [41]

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