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Table 6 Multivariate logistic regression model between possible risk factors in clinical patients

From: Prevalence, risk factors and molecular epidemiology of highly resistant gram negative rods in hospitalized patients in the Dutch region Kennemerland

  Unadjusted association Fully adjusted modela
Risk factor Odds ratio (95 % CI) P-value Odds ratio (95 % CI) P-value
Sex 1.29 (0.53–3.14) 0.568 1.12 (0.43–2.91) 0.823
Used antibiotics 6 months before current admission 1.34 (0.51–3.55) 0.559 0.84 (0.28–2.51) 0.756
Used antibiotics during admission 1.43 (0.59–3.45) 0.425 1.15 (0.41–3.23) 0.791
Admitted before current admission (up to 1 year) 2.25 (0.89–5.70) 0.086 2.21 (0.80–6.10) 0.126
Known HR-GNR positive in the past 7.32 (1.82–29.35) 0.005 6.54 (1.35–31.61) 0.020
Age (years)     
 Group 1 (0–56 years) 1 (ref) - 1 (ref) -
 Group 2 (57–70 years) 1.30 (0.34–4.98) 0.701 0.84 (0.20–3.45) 0.806
 Group 3 (71–79 years) 2.30 (0.69–7.69) 0.178 1.73 (0.49–6.15) 0.395
 Group 4 (80–94 years) 0.77 (0.17–3.50) 0.730 0.60 (0.12–2.93) 0.530
Time from admission to sampling (days)     
 Group 1 (0–1 days) 1 (ref) - 1 (ref) -
 Group 2 (2–3 days) 0.60 (0.15–2.38) 0.468 0.47 (0.11–2.01) 0.311
 Group 3 (4–6 days) 0.64 (0.16–2.53) 0.519 0.52 (0.12–2.29) 0.385
 Group 4 (7–48 days) 1.40 (0.49–3.98) 0.531 1.10 (0.34–3.62) 0.870
  1. aCorrected for (1) Antibiotic use during current admission, (2) Antibiotic use up 6 months before current admission, (3) sex, (4) age, (5) admitted before current admission, (6) time from start admission to sampling and (7) known HR-GNR positive in the past