Study | Time period | Strata | Standardization | Annual incidence rate | Amputations per annum | |||
---|---|---|---|---|---|---|---|---|
 |  |  | Crude | Age | Sex | Mean | SD | Mean |
No Stratification | ||||||||
 Lazzarini et al. [37] | 2005–2010 |  | Yes | No | No | 361 | 61 | 502 |
 Davis et al. [36] | 1996–2000 | Toe | Yes | No | No | 340 | NR | 10 |
 | Foot | Yes | No | No | 30 | NR | 0.5 | |
 Kurowski et al. [38] | 2000–2010 | T1 DM initial | No | Yes | Yes | 257 | 76 | 12 |
 | T1 DM repeat | No | Yes | Yes | 5908 | 2704 | 11 | |
 | T2 DM initial | No | Yes | Yes | 238 | 21 | 124 | |
 | T2 DM repeat | No | Yes | Yes | 23,011 | 5888 | 86 |