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Table 2 Prevalence rate of lower-extremity amputation from 2009 to 2013 according to urbanization level

From: Urban-rural disparity in lower extremities amputation in patients with diabetes after nearly two decades of universal health Insurance in Taiwan

 Year
20092010201120122013Change %βP for trend
Case number
 Urban922888814719798   
 Sub-urban772785707624716   
 Rural322315289235330   
Prevalence rate(104)
Overall
 Urban24.8 (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-urban35.7 (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
 Rural43.3 (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
 Urban20.6 (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-urban31.1 (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
 Rural40.0 (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
 Urban29.3 (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-urban40.9 (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
 Rural47.3 (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%−0.0700.005
  1. Numbers in parentheses are 95% confidence intervals
  2. β is the year trend of annual prevalence rate of LEA between 2009 and 2013 estimated from Poisson regression model