Table 2.
Age-standardized prevalence and incidence of diagnosed knee osteoarthritis in Beijing, China, 2008–2017.
| 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Prevalence (%, 95% CI) | ||||||||||
| Overall | 1.567 (1.566, 1.568) |
2.124 (2.123, 2.125) |
3.412 (3.411, 3.413) |
4.499 (4.498, 4.500) |
5.054 (5.053, 5.055) |
5.007 (5.006, 5.008) |
6.040 (6.038, 6.041) |
6.480 (6.479, 6.481) |
5.855 (5.854, 5.856) |
5.935 (5.933, 5.936) |
| Men | 1.867 (1.866, 1.868) |
2.489 (2.487, 2.490) |
2.100 (2.098, 2.101) | 2.827 (2.826, 2.829) |
2.932 (2.930, 2.933) |
2.962 (2.962, 2.964) |
3.751 (3.749, 3.752) |
4.106 (4.104, 4.108) |
3.737 (3.736, 3.739) |
3.842 (3.840, 4.843) |
| Women | 1.262 (1.260, 1.263) |
1.752 (1.751, 1.753) |
4.752 (4.751, 4.754) | 6.206 (6.204, 6.207) | 7.222 (7.219, 7.224) |
7.095 (7.093, 7.098) |
8.377 (8.374, 8.379) |
8.905 (8.902, 8.907) |
8.019 (8.017, 8.020) |
8.072 (8.069, 8.073) |
| Incidence (per 1000 person-years, 95% CI) | ||||||||||
| Overall | 15.21 (15.20, 15.22) |
20.73 (20.72, 20.74) |
22.45 (22.44, 22.46) | 30.45 (20.72, 30.46) | 31.21 (31.20, 31.22) | 26.92 (26.91, 26.94) | 33.85 (33.84, 33.86) |
27.95 (27.94, 27.96) | 22.60 (22.59, 22.61) | 20.60 (20.59, 20.61) |
| Men | 8.10 (8.09, 8.11) |
11.66 (11.65, 11.67) | 13.15 (13.14, 13.16) | 18.15 (18.14, 18.16) | 18.96 (18.95, 18.98) | 17.24 (17.23, 17.25) | 23.05 (23.04, 23.06) | 19.71 (19.69, 19.72) | 16.14 (16.13, 16.15) | 15.01 (15.00, 15.02) |
| Women | 22.48 (22.47, 22.49) | 29.99 (29.98, 30.00) | 31.93 (31.92, 31.95) | 43.00 (42.98, 43.02) | 43.73 (43.72, 43.75) | 36.81 (36.79, 36.83) | 44.89 (44.87, 44.91) | 36.36 (36.35, 36.38) | 29.19 (29.18, 29.21) | 26.31 (26.30, 26.32) |
Note: Population data for Beijing from China’s 6th national census were used to standardize prevalence and incidence.