Table 1 Prevalence of S. aureus and MRSA carriage by population group and factors associated with nasal carriage
Characteristic (n) | S. aureus | Univariate logistic | Multivariate logistic | MRSA | Univariate logistic | |||
|---|---|---|---|---|---|---|---|---|
n (%) | P value | OR(95% CI) | P value | OR (95% CI) | n (%) | P value | OR(95% CI) | |
Sex | ||||||||
 Male (187) | 42(22.5) | 0.155 | 1.414(0.877–2.279) |  |  | 4(2.1) | 0.842 | 0.878(0.244–3.157) |
 Female (247) | 42(17.0) |  |  |  |  | 6(2.4) |  |  |
Duration of employment | ||||||||
  < 1 year (49) | 9(18.4) | 0.149 | 1.790(0.813–3.941) |  |  | 3(6.1) | 0.075 | 3.522(0.880–14.093) |
 1–5 years (150) | 35(23.3) | 0.215 | 1.358(0.837–2.202) |  |  | 2(1.3) | 0.338 | 0.466(0.098–2.224) |
 6–10 years (93) | 17(18.2) | 0.631 | 0.866(0.481–1.559) |  |  | 2(2.2) | 0.911 | 0.915(0.191–4.383) |
 11–20 years (85) | 18(21.2) | 0.772 | 1.090(0.608–1.953) |  |  | 3(3.5) | 0.407 | 1.787(0.452–7.061) |
  > 20 years (57) | 8(14.3) | 0.228 | 0.616(0.280–1.354) |  |  | 0(0) | – | – |
Department | ||||||||
 Microbiological laboratory (130) | 34(26.2) | 0.039 | 1.677(1.027–2.740) | 0.04 | 1.630(1.024–2.597) | 2(1.5) | 0.492 | 0.578(0.121–2.760) |
 Other laboratory (304) | 53(17.4) |  |  | 8(2.6) |  | |||
Work protection | ||||||||
 Standard (354) | 74(20.9) | 0.155 | 1.620(0.833–3.151) |  |  | 8(2..3) | 0.951 | 0.951(0.197–4.597) |
 Non-standard (80) | 13(16.2) |  |  |  | 2(2.5) |  | ||
Nasal cleaning habit | ||||||||
 Daily or weekly (106) | 29(27.4) | 0.032 | 1.753(1.050–2.927) | 0.101 | 1.511(0.923–2.471) | 3(2.8) | 0.679 | 1.336(0.339–5.259) |
 Rarely or never (328) | 58(17.7) |  |  | 7(2.1) |  | |||
Living with hospital staff | ||||||||
 Yes (147) | 40(27.2) | 0.008 | 1.909(1.182–3.083) | 0.008 | 1.848(1.174–2.901) | 3(2.0) | 0.794 | 0.833(0.212–3.271) |
 No (287) | 47(16.4) |  |  | 7(2.4) |  | |||
Underlying disease | ||||||||
 Yes (65) | 17(26.2) | 0.239 | 1.873(0.982–3.573) |  |  | 2(3.3) | 0.65 | 1.884(0.386–9.195) |
 No (369) | 70(18.9) |  |  |  | 8(2.2) |  | ||
Hospitalization in past one years | ||||||||
 Yes (32) | 9(28.1) | 0.157 | 1.085(0.450–2.617) |  |  | 0(0) | – |  |
 No (402) | 78(19.4) |  |  |  | 10(2.5) |  | ||
Current smoking statue | ||||||||
 Yes (23) | 5(21.7) | 0.837 | 1.114(0.402–3.090) |  |  | 1(4.3) | 0.511 | 2.030(0.246–16.748) |
 No (411) | 82(20.0) |  |  |  | 9(2.2) |  | ||