Study | Time period | Strata | Standardization | Annual incidence rate | Amputations per annum | |||
---|---|---|---|---|---|---|---|---|
 |  |  | Crude | Age | Sex | Mean | SD | Mean |
No Stratification | ||||||||
 Alvarsson et al. [52] | 2001–2006 |  | Yes | No | No | 131.90 | 96.92 | 6 |
 Canavan et al. [43] | 1995–1999a |  | No | Yes | Yes | NR | NR | NR |
 Kennon et al. [51] | 2004–2008 |  | Yes | No | No | 103.80 | 11.30 | 205 |
 Lai et al. [53] | 2000–2010 |  | Yes | No | No | 118.91 | 26.79 | 71 |
 Rayman et al. [45] | 1997–1999 |  | Yes | No | No | 123.33 | 27.15 | 11 |
 Valabhji et al. [46] | 2004–2008 |  | Yes | No | No | 146.64 | 85.64 | 7 |