Table 2

Age-adjusted incidence rate (IR per 100 000 person-years) and 95% CI of full-time disability retirement due to knee osteoarthritis during 2005–2013 among men and women by occupational group

Occupational group	Men		Women
Occupational group	IR	95% CI	IR	95% CI
Managers	10	6 to 21	20	10 to 46
Professionals	8	5 to 13	10	6 to 18
Teaching professionals	12	6 to 23	16	10 to 25
Physical and engineering science technicians	34	25 to 50	20	10 to 45
Environmental officers and nurses	22	7 to 75	33	23 to 50
Finance and sales associate professionals and administrative secretaries	32	23 to 46	30	22 to 42
Office clerks	56	37 to 37	32	23 to 44
Customer services clerks	21	5 to 108	25	13 to 50
Service workers	81	59 to 117	118	104 to 134
Shop workers	30	15 to 69	86	66 to 117
Agricultural and fishery workers	92	72 to 120	199	157 to 257
Construction workers, electricians and plumbers	142	120 to 170	87	34 to 247
Metal and machinery workers	102	87 to 122	56	24 to 144
Craft workers	66	40 to 118	78	46 to 141
Chemical, wood and metal processing workers	98	71 to 140	132	79 to 235
Machine operators and assemblers	64	46 to 90	101	75 to 142
Professional drivers	70	55 to 91	141	77 to 261
Building caretakers, cleaners, assistant nurses and kitchen workers	112	82 to 157	246	216 to 282
Unskilled transport, construction and manufacturing workers	104	76 to 148	133	84 to 230
All	60	56 to 65	72	67 to 77