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. Author manuscript; available in PMC: 2022 Dec 1.
Published in final edited form as: Semin Arthritis Rheum. 2021 Sep 27;51(6):1193–1199. doi: 10.1016/j.semarthrit.2021.09.006

Table 4.

Survival Rates for Olmsted County residents by Period

Measure Period One
(1950-1979)		 Period Two
(1980-1999)		 Period Three
(2000-2019)		 Total Cohort
(1950-2019)
Number of patients 63 111 130 304
Number of deaths 62 107 68 237
Expected number of deaths 60.0 96.8 82.9 239.8
Standardized mortality ratio (95% CI) 1.03 (0.79, 1.32) 1.11 (0.91, 1.34) 0.82 (0.64, 1.04) 0.99 (0.87, 1.12)
1-sample log rank test p-value 0.80 0.30 0.10 0.86
10-year survival, % (95% CI) 57.0 (45.8, 70.7) 53.2 (44.6, 63.3) 58.1 (49.2, 68.7) 56.4 (50.8, 62.5)