Table 5.

Summary of multiple regression analysis of determinants of distress (N = 543).

Model	Predictor	B	SE B	β
1a	Age	−0.08	0.02	−0.15***	R2 = 0.04, F(6, 536) = 4.08**
	Professional training in health	1.01	0.49	0.09*
	Years of experience at the CLS	0.41	0.18	0.10*
2b	Age	−0.04	0.02	−0.09*	R2 = 0.13, F(7, 5.356) = 11.30***
	Professional training in health	1.01	0.47	0.09*
	Work-related demands	0.99	0.14	0.30***
3c	Professional training in health	1.09	0.47	0.10*	R2 = 0.16, F(16, 526) = 6.44***
	Work-related demands	0.59	0.18	0.18***
	. little contact with other volunteers/employees	0.19	0.08	0.10*
	… lack of insight into effectiveness because of anonymity	0.69	0.33	0.10*

^*p < 0.001,

^**p < 0.01,

^***p < 0.05.

^aPredictors: Age, Gender, Professional training in health, Years of experience at the CLS, Hours per week working at the CLS, Location of work.

^bPredictors: Age, Gender, Professional training in health, Years of experience at the CLS, Hours per week working at the CLS, Location of work, Work-related demands.

^cPredictors: Age, Gender, Professional training in health, Years of experience at the CLS, Hours per week working at the CLS, Location of work, Work-related demands, Organization does not listen carefully to wishes or needs of volunteer/employee, There is little contact with other volunteers because they work from home, The support team is not accessible, although there is a need for it, Volunteer hardly has time for a break, The organization applies the philosophy of non-intervention, The identity caller/chatter is anonymous, therefore the volunteer does not know what effect the conversation has had, The shifts are too long, Volunteer/employee must work night shifts, The location of the telephone helpline is not optimal.