Table 1.
Study demographics
| Chlorhexidine–alcohol (n = 1835) | Iodine–alcohol (n = 1830) | |
|---|---|---|
| Age (years)* | 65 (19–94) | 65 (18–98) |
| Sex | ||
| M | 518 (28·2) | 526 (28·7) |
| F | 1317 (71·8) | 1304 (71·3) |
| BMI (kg/m2)* | 26·5 (15·8–66·2) | 26·5 (15·0–49·6) |
| Wound classification | ||
| Clean | 1139 (62·1) | 1118 (61·1) |
| Clean‐contaminated | 617 (33·6) | 635 (34·7) |
| Contaminated | 48 (2·6) | 46 (2·5) |
| Dirty | 20 (1·1) | 19 (1·0) |
| Unknown | 11 (0·6) | 12 (0·7) |
| ASA fitness grade | ||
| I | 399 (21·7) | 397 (21·7) |
| II | 1137 (62·0) | 1120 (61·2) |
| III | 266 (14·5) | 272 (14·9) |
| IV | 19 (1·0) | 25 (1·4) |
| V | 1 (0·1) | 2 (0·1) |
| Unknown | 13 (0·7) | 14 (0·8) |
| Malignancy | ||
| Yes | 724 (39·5) | 745 (40·7) |
| No | 898 (48·9) | 909 (49·7) |
| Unknown | 213 (11·6) | 176 (9·6) |
| Implant | ||
| Yes | 578 (31·5) | 567 (31·0) |
| No | 1257 (68·5) | 1263 (69·0) |
| Type of surgery | ||
| Breast | 539 (29·4) | 552 (30·2) |
| Vascular | 168 (9·2) | 145 (7·9) |
| Colorectal | 310 (16·9) | 346 (18·9) |
| Laparoscopic cholecystectomy | 382 (20·8) | 357 (19·5) |
| THA/TKA | 436 (23·8) | 430 (23·5) |
| Duration of surgery (min)* | 80 (10–393) | 81 (13–401) |
| Antibiotic prophylaxis | ||
| Yes | 1156 (63·0) | 1175 (64·2) |
| No | 177 (9·6) | 162 (8·9) |
| Unknown | 502 (27·4) | 493 (26·9) |
| NNIS grade | ||
| 0 | 1036 (56·5) | 1024 (56·0) |
| 1 | 682 (37·2) | 676 (36·9) |
| 2 | 87 (4·7) | 99 (5·4) |
| 3 | 7 (0·4) | 6 (0·3) |
| Unknown | 23 (1·3) | 25 (1·4) |
Values in parentheses are percentages unless indicated otherwise;
*
values are median (range). THA, total hip arthroplasty; TKA, total knee arthroplasty; NNIS, National Nosocomial Infections Surveillance classification.