Table 2

Cancer incidence among patients with AS in Sweden 1965–95

	Observed cancers	SIR	95% CI
Sex
Male	262	1.08	0.96 to 1.22
Female	63	0.92	0.71 to 1.18
Age at entry
0–19	2	2.42	0.29 to 8.73
20–39	56	1.17	0.88 to 1.51
40–59	158	1.02	0.86 to 1.19
60-	109	1.03	0.84 to 1.24
Attained age at cancer diagnosis (years)
0–19	0	–	–
20–39	18	1.47	0.87 to 2.33
40–44	15	1.17	0.66 to 1.94
45–49	15	0.74	0.42 to 1.23
50–59	67	1.12	0.86 to 1.42
60-	210	1.02	0.89 to 1.17
Follow up time (years)
0–5	92	1.02	0.82 to 1.25
6–10	81	0.91	0.72 to 1.13
11–15	74	1.14	0.89 to 1.43
16–	78	1.18	0.93 to 1.47
Time period
1965–75	137	1.22	1.03 to 1.45
1976–85	129	0.90	0.75 to 1.07
1986–95	59	1.07	0.82 to 1.38
All cancers	325	1.05	0.94 to 1.17