Table 3

Independent associated factors for primary admissions for foot-related conditions using multivariate logistical regression (ORs (95% CI))

Risk factorUnadjustedp ValueAdjustedp Value
Model 1
 Myocardial infarct0.15 (0.03 to 0.70)0.016*0.34 (0.06 to 1.90)0.219
 Acute foot trauma29.49 (7.28 to 119.48)<0.001*73.32 (15.86 to 338.92)<0.001*
 PAD<0.001*<0.001*
 Nil PADReferentReferent
 Mild PAD0NA0NA
 Moderate PAD2.37 (0.62 to 9.04)0.2075.45 (1.05 to 28.23)0.044
 Critical PAD53.60 (16.82 to 170.84)<0.001*140.56 (30.82 to 641.04)<0.001*
 Current foot infection29.39 (7.52 to 114.83)<0.001*53.11 (9.89 to 285.17)<0.001*
 Past GP treatment4.65 (1.64 to 13.20)0.004*7.61 (2.30 to 25.19)0.001*
 Past surgeon treatment5.88 (1.66 to 20.81)0.006*6.98 (1.91 to 25.54)0.003*
 Model 1 results:Pseudo R2: 0.602; Omnibus: df=8, p=<0.001Missing: 14 (1.9%); H&L: p=0.013Pseudo R2: 0.657; Omnibus: df=15, p=<0.001Missing: 36 (4.9%); H&L: p=0.880
Model 2+ Past foot treatment
 Foot risk status<0.001*<0.001*
 Low riskReferentReferent
 At risk1.66 (0.15 to 18.76)0.6822.01 (0.18 to 23.16)0.574
 High risk23.12 (5.05 to 105.95)<0.001*39.57 (8.15 to 192.05)<0.001*
 Acute181.44 (40.52 to 812.51)<0.001*158.63 (30.34 to 829.51)<0.001*
 Past GP treatment2.70 (1.17 to 6.25)0.020*6.40 (2.36 to 17.40)<0.001*
 Past surgeon treatment4.31 (1.49 to 12.44)0.007*11.62 (3.46 to 39.03)<0.001*
 Model 2 results:Pseudo R2: 0.582; Omnibus: df=5, p=<0.001Missing: 2 (0.3%); H&L: p=0.861Pseudo R2: 0.638; Omnibus: df=10, p=<0.001Missing: 2 (0.3%); H&L: p=0.954
  • *p<0.05.df, degrees of freedom; H&L, Hosmer and Lemeshow test; missing, excluded missing cases; NA, not applicable; Omnibus, Omnibus tests of model coefficients; Pseudo R2, Nagelkerke R2; GP, general practitioner; PAD, peripheral arterial disease.