Table 6.
Infectious outcomes over five years
| Univariable* | Adjusted** | ||||||
|---|---|---|---|---|---|---|---|
| Variable and values | n (%) of events | OR (95%CI) | p-value | Area under ROC curve (95%CI) | OR (95%CI) | p-value | ma |
| Year 1–5 | |||||||
| 1 | 13 (2.9%) | ||||||
| 2 | 18 (2.2%) | ||||||
| 3 | 19 (2.4%) | ||||||
| 4 | 9 (1.2%) | ||||||
| 5 | 8 (1.1%) | 0.78 (0.64–0.94) | 0.0086 | 0.59 (0.53–0.66) | 0.78 (0.64–0.94) | 0.0092 | |
| Gender | |||||||
| Female | 36 (1.5%) | 0 | |||||
| Male | 31 (2.8%) | 1.91 (1.18–3.11) | 0.0088 | 0.58 (0.52–0.64) | 1.97 (1.21–3.22) | 0.0066 | |
| Age | |||||||
| 65– < 81 | 22 (1.9%) | 0 | |||||
| 81– < 89 | 22 (1.7%) | ||||||
| 89–104 | 23 (2.0%) | 1.01 (0.98–1.04) | 0.57 | 0.52 (0.45–0.59) | 1.01 (0.98–1.05) | 0.37 | |
| ASA | |||||||
| I | 0 (0.0%) | 9 | |||||
| II | 19 (1.4%) | ||||||
| III | 43 (2.4%) | ||||||
| IV | 5 (2.1%) | 1.52 (1.05–2.21) | 0.027 | 0.57 (0.52–0.63) | 1.41 (0.96–2.06) | 0.078 | |
| Diabetes | |||||||
| Yes | 12 (2.1%) | 0 | |||||
| No | 55 (1.8%) | 0.88 (0.47–1.65) | 0.68 | 0.51 (0.46–0.56) | 0.93 (0.49–1.75) | 0.81 | |
| Hospital length of stay (days) | |||||||
| 2- < 9 | 8 (0.7%) | ||||||
| 9- < 14 | 10( 0.8%) | ||||||
| 14–133 | 49 (4.3%) | 1.11 (1.09–1.13) | < 0.0001 | 0.76 (0.70–0.82) | 1.11 (1.08–1.13) | < 0.0001 | 1 |
| Cognitive failure | |||||||
| Yes | 25 (1.9%) | 1 | |||||
| No | 42 (1.9%) | 0.99 (0.60–1.63) | 0.97 | 0.50 (0.44–0.56) | 1.05 (0.63–1.75) | 0.84 | |
| Time to surgery | |||||||
| < 36 h | 51 (1.7%) | 2 | |||||
| > 36 h | 16 (2.9%) | 1.71 (0.97–3.02) | 0.065 | 0.54 (0.49–0.59) | 1.72 (0.97–3.05) | 0.064 | |
| Procedure time, minutes | |||||||
| 9– < 57 | 17 (1.4%) | 1 | |||||
| 57– < 85 | 14 (1.2%) | ||||||
| 85–248 | 35 (2.9%) | 1.29 (1.05–1.59) | 0.013 | 0.59 (0.51–0.66) | 1.31 (1.07–1.62) | 0.0095 | |
| Pressure ulcers, Norton scale 1–4 | |||||||
| 1 versus no | 8 (4.4%) | 2.10 (0.95–4.63) | 0.066 | 2.06 (0.93–4.56) | 0.076 | 1732b | |
| 2 versus no | 2 (1.8%) | 0.83 (0.20–3.50) | 0.80 | 0.82 (0.19–3.48) | 0.79 | ||
| 3 versus no | 1 (6.7%) | 3.28 (0.42–25.71) | 0.26 | 3.37 (0.43–26.59) | 0.25 | ||
| 4 versus no | 2 (25.0%) | 15.31 (2.98–78.79) | 0.0011 | 0.57 (0.50–0.64) | 13.26 (2.53–69.35) | 0.0022 | |
| Urinary tract infection | 9 (3.0%) | 1.71 (0.84–3.49) | 0.14 | 0.53 (0.48–0.57) | 1.68 (0.82–3.43) | 0.15 | |
| Sepsis 0 | 59 (1.7%) | 1 | |||||
| Any Sepsis | 8 (10.4%) | 6.71 (3.09–14.58) | < 0.0001 | 0.55 (0.51–0.59) | 5.98 (2.73–13.10) | < 0.0001 | |
| Pneumonia | 8 (3.1%) | 1.72 (0.82–3.65) | 0.15 | 0.52 (0.48–0.56) | 1.55 (0.73–3.30) | 0.25 | |
| Any type of infection except SSI | 21 (2.8%) | 1.74 (1.03–2.94) | 0.037 | 0.55 (0.50–0.61) | 1.63 (0.97–2.76) | 0.068 | |
| Skin damage | 32 (2.6%) | 1.81 (1.11–2.95) | 0.018 | 0.57 (0.51–0.63) | 1.66 (1.01–2.73) | 0.046 | 30 |
| Before and after one CHXc shower was implemented | 27 (2.3%) | 1 | |||||
| 39 (1.6%) | 0.71 (0.43–1.17) | 0.18 | 0.54 (0.48–0.60) | 0.72 (0.44–1.18) | 0.19 | ||
| IUCd more than once | 18 (4.9%) | 3.60 (2.00–6.49) | < 0.0001 | 0.61 (0.54–0.68) | 3.30 (1.81–6.01) | < 0.0001 | |
P-values, OR and area under ROC curve are based on original values and not on stratified groups
OR is the ratio for the odds of an increase in the predictor of one unit. For procedure time, the odds is given per 30 min
Ma = missing data
b = pressure ulcers, Norton stage 1–4, recorder years 1–3
CXHc = chlorhexidine gluconate
d = in-dwelling catheterisation more than once during hospital stay
*All tests are performed with univariable logistic regression
**Adjusting for gender and age using logistic regression