Table 3

Age standardised prevalence of hip OA in Iceland

Age group		Hip OA cases in Iceland per 1000 in study group in 1990–96			Icelandic population per age group in 1990			Calculated cases of OA per age group in population
Age group		Women	Men		Total	Women		Men	Total	Women	Men	Total
40–44	0	26	8	7870	8495	16365	0	221	131
45–49	42	33	39	6397	6508	12905	269	215	503
50–54	67	37	53	5154	5151	10305	345	191	546
55–59	98	75	88	5363	5275	10638	526	396	936
60–64	82	155	112	5119	5003	10122	420	775	1134
65–69	96	99	97	4522	4221	8743	434	418	848
70–74	160	228	189	3665	3154	6819	586	719	1289
75–79	300	193	252	2928	2234	5162	878	431	1301
80–84	139	273	202	2046	1406	3452	284	384	697
85-	357	192	263	1857	1079	2936	663	207	772
Total				54060	52235	106295	4661	3956	8515

The overall crude prevalence rate for hip OA may be calculated as 165 cases per 1517 examined, or 10.8 % (table 1). The estimated age standardised prevalence rate may be calculated as 8515 cases per a total population aged 35 years and over of 106 295, or 8%.