. 2019 Oct 11;58(3):224–237. doi: 10.2486/indhealth.2019-0067

Table 3. Predicting organizational citizenship behaviour in upper white- (n=1,754), lower white- (n=638), and blue-collar workers (n=906).

Predictors		Organizational Citizenship Behaviour

Sub-sample		Upper white-collars					Lower white-collars					Blue-collars

Coefficients		β	β	β	β	r	β	β	β	β	r	β	β	β	β	r
S1: Back-grounds
	Sex^a	−0.06*	−0.06*	−0.03	−0.03	−0.06*	−0.04	−0.03	−0.03	−0.02	−0.05	−0.10**	−0.10**	−0.10**	−0.10**	−0.11***
	Education^b	−0.04	−0.04	−0.06**	−0.06**	−0.04	0.02	0.01	0.02	0.02	0.06	0.05	0.04	0.04	0.04	0.08**
	Age^b	0.02	0.03	−0.00	−0.00	0.02	−0.09*	−0.06	−0.07	−0.07	−0.12**	−0.13***	−0.12***	−0.15***	−0.15***	−0.13***
	Children^c	0.06*	0.06*	0.06*	0.05*	0.07**	0.04	0.03	0.03	0.03	0.05	0.01	0.01	0.01	0.01	−0.01
	ΔR²	0.010**					0.017*					0.030***

S2: Buffer
	SOC	0.19***	0.19***	0.19***	0.19***	0.20***	0.23***	0.22***	0.23***	0.23***	0.23***	0.18***	0.17***	0.16***	0.16***	0.19***
	ΔR²	0.039***					0.052***					0.035***

S3: IJP		0.07**	0.04	0.00	−0.01	0.10***	0.18***	0.12*	0.09*	0.09	0.19***	0.19***	0.16***	0.12**	0.13**	0.19***
	ΔR²	0.005**					0.031***					0.036***

S4: ICP			0.05	0.01	0.00	0.11***		0.12**	0.09	0.09	0.22***		0.06	-0.02	-0.02	0.20***
	ΔR²		0.001					0.010**					0.002

S5: LD				0.18***	0.17***	0.19***			0.09*	0.09	0.17***			0.21***	0.21***	0.26***
	ΔR²			0.024***					0.006*					0.031***

S6: WI					0.04	0.11***				0.01	0.12**				−0.02	0.10**
	ΔR²				0.001					0.000					0.000

^a: female/male; ^b: continuous; ^c: no/yes; S1: Step1; S2: Step2; S3: Step3; S4: Step4; S5: Step5; S6: Step6; SOC: selecting-optimizing-compensating strategies; IJP: intensified job-related planning and decision-making demands; ICP: career planning and decision-making demands; LD: intensified learning demands; WI: work intensification. *p<0.05, **p<0.01, ***p<0.001. ΔR² Change in explanation rates when the predictor (S2, S3, S4, S5, S6) or the group of predictors (S1) were entered into analysis.