Table 2.
Patient characteristics and results of univariable and multivariable logistic regression using generalized estimating equation for risk factors for methicillin-resistance in patients with Staphylococcus aureus isolates from Swiss nursing homes between 2007 and 2017
| MSSA | MRSA | Univariable | Multivariable | ||||
|---|---|---|---|---|---|---|---|
| n = 926 | n = 556 | Row %a | OR (95% CI) | P value | OR (95% CI) | P value | |
| Sex | |||||||
| Female | 542 | 298 | 35.5 | ref. | ref. | ||
| Male | 384 | 258 | 40.2 | 1.4 (0.9–2.2) | 0.11 | 1.6 (1.0–2.5) | 0.06 |
| Age in years | |||||||
| < 70 | 133 | 57 | 30.0 | ref. | ref. | ||
| 70–85 | 563 | 361 | 39.1 | 1.5 (1.1–2.2) | 0.02 | 1.3 (0.9–1.9) | 0.13 |
| > 85 | 230 | 138 | 37.5 | 1.5 (1.0–2.2) | 0.04 | 1.3 (0.8–1.9) | 0.27 |
| Region | |||||||
| French/Italian speaking | 697 | 498 | 41.7 | ref. | ref. | ||
| German speaking | 229 | 58 | 20.2 | 0.1 (0.1–0.2) | < 0.0001 | 0.1 (0.1–0.2) | < 0.0001 |
| Sampling site | |||||||
| Urogenital | 259 | 174 | 40.2 | ref. | ref. | ||
| Skin | 492 | 294 | 37.4 | 0.9 (0.7–1.2) | 0.44 | 0.9 (0.7–1.1) | 0.20 |
| Other | 175 | 88 | 33.5 | 0.8 (0.5–1.1) | 0.09 | 0.7 (0.5–1.0) | 0.06 |
Abbreviations: MSSA Methicillin-susceptible Staphylococcus aureus, MRSA Methicillin-resistant Staphylococcus aureus, OR Odds Ratio, CI Confidence Interval
Significant P values are in bold and non-significant ones (P ≥ 0.05) are not in bold
aESC-R/(ESC-S + ESC-R)