Table 4.

Comparison of scores at baseline and follow-up for workplace risk factors by domain (WHOQOL-BREF questionnaire)

Domain	International standard (SD)	Baseline			Follow-up			Change from baseline to follow-up
		n*	Cronbach’s α	Mean (SD)	N	Cronbach’s α	Mean (SD)	Mean (95% CI)
									Physical health	73.5 (18.1)	208/217	0.57	52.3 (10.6)	150	0.64	50.0 (10.9)	−2.3 (−4.1 to to 0.5)
Psychological well-being	70.6 (14.0)	212/221	0.65	54.3 (9.4)	152	0.67	52.2 (10.2)	−2.3 (−4.1 to to 0.4)
Social relationships	71.5 (18.2)	213/222	0.64	56.3 (14.2)	154	0.67	57.4 (12.8)	0.7 (−1.9 to 3.2)
Environment	75.1 (13.0)	213/222	0.71	42.4 (11.3)	153	0.76	41.8 (11.5)	−0.7 (−2.2 to 0.9)
WHOQOL-BREF		207/216	0.83	50.1 (8.4)	148	0.87	48.6 (9.2)	−1.6 (−3.0 to to 0.2)

*Numbers given are those with data for domain and the three factors/number with data for domain: population norms: physical health 73.5 (SD = 18.1); psychological well-being 70.6 (14.0); social relationships 71.5 (SD 18.2) and environment 75.1 (SD 13.0).

WHOQOL, World Health Organisation Quality of Life.