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Table 2—

Incidence (per 100,000 person-years) of initial unilateral amputation at or proximal to the transmetatarsal level in the diabetic and nondiabetic general population

Age-groupPrevalence of diabetesDiabetic
Nondiabetic
No. of personsPopulationIncidence (95% CI)No. of personsPopulationIncidence (95% CI)
Women        
    45–64 years 4.3 9,277 75 (22–138) — — 
    65–74 (55–74) years 11.3 (8.011 9,179 120 (55–197) 11 172,465 7 (3–10
    75–84 years 14.7 30 10,100 297 (194–408) 34 58,769 58 (39–78) 
    ≥85 years 13.4 14 4,256 329 (167–518) 34 27,548 123 (83–167) 
    Population ≥45 years 8.1 62 32,307 192 (145–241) 79 367,337 22 (17–26) 
    Total population 4.1 62 35,260 176 (134–221) 79 822,365 10 (8–12) 
Men        
    45–64 years 6.8 11 15,133 73 (33–117) — — 
    65–74 (55–74) years 14.6 (11.421 10,813 194 (118–282) 19 161,088 12 (7–17) 
    75–84 years 16.7 19 8,551 222 (129–328) 39 42,767 91 (63–121) 
    ≥85 years 14.3 20 2,153 929 (545–1,369) 20 12,945 154 (92–225) 
    Population ≥45 years 9.9 71 36,105 197 (152–244 78 327,467 24 (19–29) 
    Total population 4.6 71 38,860 183 (142–226 78 800,303 10 (8–12) 
Age-groupPrevalence of diabetesDiabetic
Nondiabetic
No. of personsPopulationIncidence (95% CI)No. of personsPopulationIncidence (95% CI)
Women        
    45–64 years 4.3 9,277 75 (22–138) — — 
    65–74 (55–74) years 11.3 (8.011 9,179 120 (55–197) 11 172,465 7 (3–10
    75–84 years 14.7 30 10,100 297 (194–408) 34 58,769 58 (39–78) 
    ≥85 years 13.4 14 4,256 329 (167–518) 34 27,548 123 (83–167) 
    Population ≥45 years 8.1 62 32,307 192 (145–241) 79 367,337 22 (17–26) 
    Total population 4.1 62 35,260 176 (134–221) 79 822,365 10 (8–12) 
Men        
    45–64 years 6.8 11 15,133 73 (33–117) — — 
    65–74 (55–74) years 14.6 (11.421 10,813 194 (118–282) 19 161,088 12 (7–17) 
    75–84 years 16.7 19 8,551 222 (129–328) 39 42,767 91 (63–121) 
    ≥85 years 14.3 20 2,153 929 (545–1,369) 20 12,945 154 (92–225) 
    Population ≥45 years 9.9 71 36,105 197 (152–244 78 327,467 24 (19–29) 
    Total population 4.6 71 38,860 183 (142–226 78 800,303 10 (8–12) 

*Per 100,000 person-years.

The values are for the age-group 55–74 years because no lower limb amputation was performed on nondiabetic persons aged <55 years (CIs could only be calculated for the wider age interval because of small numbers).

All person-years generated by persons at risk do not sum to equal because this would imply that prevalence would be constant over age-groups.

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