Table 3. Numerical summary of the results of the implementation appraisal checklist.

	All reviews (excluding duplicates)	Task variety	Employment participation	Compressed working week	Shift work
Total number of studies	103	21	18	40	26
Mean implementation score	2.6	2.6	3.4	2.3	2.4
Median implementation score	3	3	4	2	2.5
Studies with lowest implementation score (0,1,2)	51	9	4	26	13
Studies with intermediate implementation score (3,4)	38	10	10	8	11
Studies with higher implementation score (⩾5)	14	2	4	6	2