Table 2

Mortality rates in the ankylosing spondylitis (AS) and the control cohorts in total and by sex and age and incidence rate ratios by sex and age

Sex, age (years)	AS cases (n=8600)			Controls (n=40 460)			Incidence rate ratio (95% CI)
Sex, age (years)	No of deaths	Person-years at risk	Mortality rate*	No of deaths	Person-years at risk	Mortality rate*	Incidence rate ratio (95% CI)
Male
18–29	2	2563	0.780	11	16 714	0.658	1.19 (0.26 to 5.35)
30–39	9	6512	1.382	30	34 827	0.861	1.60 (0.76 to 3.38)
40–49	23	7783	2.955	80	41 114	1.946	1.52 (0.96 to 2.41)
50–59	68	8850	7.684	236	45 888	5.143	1.49 (1.14 to 1.96)
60–69	129	6258	20.615	380	30 881	12.305	1.68 (1.37 to 2.05)
70–79	91	1836	49.570	303	8364	36.228	1.37 (1.08 to 1.73)
80+	37	296	125.254	100	908	110.183	1.14 (0.78 to 1.66)
Total	359	34 096	10.529	1140	178 694	6.380	1.65 (1.47 to 1.86)
Female
18–29	0	1412	0	2	9140	0.219	0 (0.0 to 0.0)
30–39	4	3525	1.135	6	19 964	0.301	3.78 (1.07 to 13.38)
40–49	10	4468	2.238	27	23 114	1.168	1.92 (0.93 to 3.96)
50–59	27	4536	5.952	74	24 610	3.007	1.98 (1.27 to 3.08)
60–69	30	2902	10.339	119	14 878	7.998	1.29 (0.87 to 1.93)
70–79	41	911	45.025	105	4500	23.333	1.93 (1.35 to 2.77)
80+	25	182	137.490	60	798	75.207	1.83 (1.15 to 2.92)
Total	137	17 934	7.639	393	97 004	4.051	1.89 (1.55 to 2.29)
Total
18–29	2	3975	0.503	13	25 854	0.503	1.00 (0.26 to 4.43)
30–39	13	10 037	1.295	36	54 791	0.657	1.97 (1.05 to 3.72)
40–49	33	12 250	2.694	107	64 227	1.666	1.62 (1.09 to 2.39)
50–59	95	13 386	7.097	310	70 498	4.397	1.61 (1.28 to 2.03)
60–69	159	9159	17.359	499	45 759	10.905	1.59 (1.33 to 1.90)
70–79	132	2746	48.063	408	12 864	31.717	1.52 (1.25 to 1.84)
80+	62	477	129.916	160	1705	93.821	1.38 (1.03 to 1.86)
Total	496	52 031	9.533	1533	275 698	5.560	1.71 (1.55 to 1.90)