Table 2

Incidences of avascular necrosis of the femoral head stratified by sex and age between groups with and without diabetes

Without diabetesWith diabetes
VariablenEventPerson-yearsIncidencenEventPerson-yearsIncidenceIRR#95% CI
All111,476451947,2094.7627,869146223,5736.531.371.31–1.43
Sex
 Female50,052188446,2384.2112,51353105,6415.021.191.11–1.27
 Male61,424263500,9715.2515,35693117,9327.891.501.42–1.59
Age-group (years)
 20–3928,50880252,3043.177,1274459,8037.362.322.15–2.51
 40–6445,092190399,5844.7511,2737294,9397.581.591.49–1.70
 65–8437,876181295,3216.139,4693068,8314.360.710.65–0.78
  • †Per 1,000 person-years.

  • #With diabetes vs. without diabetes.