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. Author manuscript; available in PMC: 2017 Jun 9.
Published in final edited form as: Osteoarthritis Cartilage. 2016 Apr 21;24(9):1518–1527. doi: 10.1016/j.joca.2016.04.012

Table III.

Overall crude, age-standardized, and age- and sex-standardized IRs per 1000 person-years and their 95% CIs for hip symptoms and three hip OA outcomes

Hip symptoms OA outcomes

Radiographic
Symptomatic
Severe radiographic
IR (95% CI) IR (95% CI) IR (95% CI) IR (95% CI)
Crude 37 (33, 41) 20 (18, 23) 13 (12, 16) 2.9 (2.3, 3.7)
Age-standardized* 39 (34, 44) 24 (20, 30) 17 (14, 20) 3.2 (2.5, 4.1)
Age- and sex-standardized* 38 (34, 43) 24 (20, 30) 17 (14, 19) 3.2 (2.5, 4.1)
*

Standardized to the 2000 projected US population.