Physical exercise at the workplace prevents deterioration of work ability among healthcare workers: cluster randomized controlled trial

Table 2 Changes in work ability index (WAI) and single item scores from baseline to 10-week follow-up

		Work	Home	Work vs Home
		Difference from 0 to 10 wks	Difference from 0 to 10 wks	Between group difference	p Value
WAI score		0.2 (−0.4,0.9)	−0.9 (-1.6,−0.2)	1.1 (0.3,1.8)	0.03^*
	Item 1: Current work ability compared with the lifetime best (0–10)	0.1 (−0.2,0.4)	−0.1 (−0.4,0.2)	0.2 (−0.1,0.5)	0.31
	Item 2: Work ability in relation to the demands of the job (2–10)	0.3 (0.0,0.6)	−0.1 (−0.4,0.1)	0.3 (0.1,0.6)	0.03^*
	Item 3: Number of current diseases diagnosed by a physician (1–7)	0.0 (−0.2,0.2)	−0.2 (−0.2,0.0)	0.1 (0.0,0.3)	0.18
	Item 4: Estimated work impairment due to diseases (1–6)	−0.1 (−0.3,0.1)	0.0 (−0.2,0.1)	0.0 (−0.2,0.1)	0.54
	Item 5: Sickness absence during the past year (1–5)	0.1 (0.0,0.3)	−0.1 (−0.2,0.0)	0.2 (0.0,0.3)	0.04^*
	Item 6: Own prognosis of work ability two years from now (1–7)	0.0 (−0.2,0.2)	−0.2 (−0.4,0.0)	0.3 (0.0,0.5)	0.09
	Item 7: Mental resources (1–4)	−0.2 (−0.3,0.0)	−0.2 (−0.3,0.0)	0.0 (−0.1,0.1)	0.99

^*Denotes difference between groups at follow-up, p < 0.05. HOME: Home-based physical exercise, WORK: Work-based physical exercise. Pre-to-post intervention changes in each group are shown in left columns, and contrasts between the groups are shown in the right hand-side column. Values are means (95 % confidence interval)

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