Table 2

Predicted age standardised hospitalisation ratio (SHR) for coxarthrosis among men in selected occupations by follow up period and 95% confidence intervals (CI)

Occupational category	Time period	People at risk	Observed number	SHR	95% CI
Self employed farmers	1981–85	63990	458	281	259 to 304
	1986–90	52907	433	283	269 to 298
	1991–93	42825	213	285	268 to 302
	1994–99	34068	355	286	262 to 313
Self employed people in agricultural tractor pools	1981–85	1414	4	210	97 to 455
	1986–90	1365	6	200	122 to 327
	1991–93	1287	3	192	116 to 315
	1994–99	1157	5	183	86 to 387
Employees in agriculture and horticulture	1981–85	21811	37	114	89 to 147
	1986–90	21507	60	138	118 to 161
	1991–93	20351	33	160	140 to 183
	1994–99	20734	97	189	158 to 227