Table 1

Prevalence of shoulder pain at baseline, and incidence

	Men				Women
	n*	Prevalence at baseline, %	Without shoulder disorder at baseline	Incident cases (incidence, %)	n*	Prevalence at baseline, %	Without shoulder disorder at baseline	Incident cases (incidence, %)
*Number of subjects at baseline (1993–94).
†All the cashiers were women.
Age
⩽29	59	34	39	13 (33)	58	31	40	8 (20)
30–39	72	32	49	13 (27)	153	49	78	18 (23)
40–49	37	46	20	5 (25)	166	51	81	16 (20)
⩾50	10	60	4	1 (25)	43	65	15	2 (13)
Sector
Assembly line	24	33	16	5 (31)	223	51	110	25 (23)
Clothing	11	36	7	3 (43)	52	37	33	3 (9)
Food	123	39	75	22 (29)	20	50	10	2 (20)
Packaging	20	30	14	2 (14)	83	42	48	12 (25)
Cashiers	†				42	69	13	2 (15)
Entire sample	178	37	112	32 (29)	420	49	214	44 (21)