TABLE 3.
Results of the multivariate logistic regression for S. aureus and MRSA colonization with adjustment for within-cluster correlation
| Characteristic |
S. aureus colonizationa (odds ratio [95% CI]) |
|
|---|---|---|
| Overall | MRSA | |
| Use of body wash | ||
| Biweekly/never | 1.00 | 1.00 |
| Daily/weekly | 0.91 (0.66, 1.27) | 0.36* (0.16, 0.77) |
| Study group | ||
| Standard (reference) | 1.00 | 1.00 |
| Enhanced standard | 0.95 (0.73, 1.24) | 0.53# (0.27, 1.04) |
| Chlorhexidine | 0.96 (0.69, 1.32) | 0.99 (0.50, 1.97) |
| Season of training start | ||
| Winter | 1.00 | 1.00 |
| Spring | 1.35# (1.00, 1.84) | 2.54* (1.19, 5.45) |
| Summer | 1.32# (0.98, 1.78) | 1.27 (0.58, 2.78) |
| Fall | 1.38# (0.97, 1.95) | 0.79 (0.29, 2.16) |
| Duration of training at the time of swab | ||
| Week n + 1 vs. n (n = 1, 2…,15) | 1.00 (0.97, 1.03) | 0.96 (0.89, 1.04) |
| Presence of SSTI case in platoon prior to enrollment | ||
| No | 1.00 | 1.00 |
| Yes | 1.28* (1.01, 1.62) | 1.34 (0.76, 2.34) |
| Frequency of hand sanitizer use, per day | ||
| ≤3 times | 1.00 | 1.00 |
| ≥4 times | 0.84 (0.67, 1.06) | 0.83 (0.46, 1.48) |
| Frequency of washing towels | ||
| ≤1 time/week or never | 1.00 | 1.00 |
| Daily/several times per week | 1.11 (0.89, 1.38) | 1.19 (0.65, 2.18) |
| Frequency of washing uniform | ||
| ≤1 time/week or never | 1.00 | 1.00 |
| Daily/several times per week | 1.13 (0.90, 1.42) | 1.05 (0.53, 2.06) |
a
*, P < 0.05; #, P < 0.1 and P > 0.05.