Table 2.
Prevalence rate of lower-extremity amputation from 2009 to 2013 according to urbanization level
| Year | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2009 | 2010 | 2011 | 2012 | 2013 | Change % | β | P for trend | |
| Case number | ||||||||
| Urban | 922 | 888 | 814 | 719 | 798 | |||
| Sub-urban | 772 | 785 | 707 | 624 | 716 | |||
| Rural | 322 | 315 | 289 | 235 | 330 | |||
| Prevalence rate(104) | ||||||||
| Overall | ||||||||
| Urban | 24.8 (23.2–26.4) | 22.7 (21.2–24.2) | 19.8 (18.5–21.2) | 16.3 (15.1–17.5) | 16.3 (15.2–17.5) | −34% | −0.117 | < 0.001 |
| Sub-urban | 35.7 (33.1–38.2) | 32.9 (30.6–35.2) | 28.3 (26.2–30.3) | 23.1 (21.3–24.9) | 23.6 (21.9–25.3) | −34% | −0.118 | < 0.001 |
| Rural | 43.3 (38.6–48.1) | 35.5 (31.6–39.4) | 31.8 (28.1–35.5) | 24.1 (21.1–27.2) | 30.8 (27.5–34.2) | −29% | −0.104 | < 0.001 |
| Female | ||||||||
| Urban | 20.6 (18.5–22.6) | 19.5 (17.6–21.5) | 15.9 (14.2–17.6) | 13.0 (11.5–14.4) | 12.1 (10.8–13.5) | −41% | −0.147 | < 0.001 |
| Sub-urban | 31.1 (27.8–34.3) | 26.9 (24.0–29.8) | 25.1 (22.4–27.8) | 17.7 (15.6–19.9) | 18.4 (16.2–20.5) | −41% | −0.146 | < 0.001 |
| Rural | 40.0 (33.8–46.2) | 29.1 (24.3–33.9) | 27.6 (23.0–32.3) | 18.4 (14.7–22.1) | 24.0 (20.0–28.0) | −40% | −0.148 | < 0.001 |
| Male | ||||||||
| Urban | 29.3 (26.8–31.8) | 26.0 (23.7–28.3) | 24.0 (21.8–26.1) | 19.8 (17.9–21.7) | 20.8 (18.9–22.6) | −29% | −0.095 | < 0.001 |
| Sub-urban | 40.9 (37.0–44.8) | 39.6 (35.9–43.3) | 31.8 (28.6–35.0) | 28.9 (26.0–31.9) | 29.3 (26.5–32.1) | −28% | −0.098 | < 0.001 |
| Rural | 47.3 (40–54.6) | 42.9 (36.6–49.2) | 36.6 (30.9–42.4) | 30.7 (25.6–35.9) | 38.5 (33.1–44.0) | −19% | −0.070 | 0.005 |
Numbers in parentheses are 95% confidence intervals
β is the year trend of annual prevalence rate of LEA between 2009 and 2013 estimated from Poisson regression model