Table 2

Comparison of baseline characteristics in the derivation and internal validation sample

Derivation sample (n=317)Internal validation sample (n=263)p Value
Age (years)57±1663±14<0.001
Diabetes mellitus50 (16%)67 (26%)0.004
Chronic anaemia36 (11%)58 (22%)<0.001
Illicit injection drug use16 (5%)8 (3%)0.227
HIV10 (3%)5 (2%)0.344
Abnormal skin findings45 (14%)23 (9%)0.040
WCC >103/μl186 (60%)122 (47%)0.003
Enterococci spp.25 (8%)23 (9%)0.709
Streptococcus viridans54 (17%)35 (13%)0.215
Staphylococcus aureus53 (17%)42 (16%)0.808
Coagulase-negative staphylococci48 (15%)52 (20%)0.142
Negative cultures48 (15%)42 (16%)0.784
Stroke30 (9.5%)29 (11%)0.535
Haematuria135 (51%)85 (41%)0.024
Proteinuria56 (21%)54 (26%)0.003
Prosthetic114 (36%)119 (45%)0.023
Aortic mechanical prothesis57 (16%)64 (22%)0.046
Vegetations238 (79%)182 (71%)0.042
Periannular complications90 (28%)43 (16%)0.001
Abscess39 (14%)29 (11%)0.292
Pseudoaneurysm37 (13%)17 (7%)0.008
Fistula29 (10%)3 (1%)<0.001
  • WCC, white cell count.