Table 3.
Multivariate analysis using logistic regression model of risk factors associated with the pressure ulcers among study population (n = 297).
| Variable | Types of pressure ulcers (yes versus no) | |||
|---|---|---|---|---|
| Immediately | 30 minutes later | |||
| OR | (95% CI) | OR | (95% CI) | |
| Gender (female versus male) | 0.98 | 0.39–2.61 | 0.65 | 0.18–2.27 |
| Operation age (yrs) | 1.03 | 1.00–1.08 | 1.06 | 1.00–1.12 |
| Type of anesthesia (general anesthesia) (yes versus no) | 17.06 | 2.09–49.43 | 5.29 | 0.56–46.71 |
| Type of operation position (nonsupine versus supine) | 32.26 | 4.48–48.79 | 18.18 | 1.32–52.63 |
| Type of surgery | ||||
| General surgery | 1.00 | — | 1.00 | — |
| Neurosurgery | 1.29 | 0.20–8.58 | 5.57 | 0.28–19.69 |
| Orthopedics surgery | 3.33 | 1.05–10.61 | 9.29 | 1.05–28.50 |
| Cardiac surgery | 6.98 | 0.72–39.88 | 22.60 | 1.20–43.85 |
| Heart-lung machine used (yes versus no) | 5.24 | 0.51–43.55 | 7.58 | 0.51–49.28 |
| Admission Braden score | 0.95 | 0.91–0.99 | 0.93 | 0.80–1.09 |
| Number of nursing intervention | 0.94 | 0.90–0.98 | 0.95 | 0.91–0.99 |
| The Hosmer-Lemeshow test | χ(8) 2 = 3.79, P = 0.88 | χ(8) 2 = 4.17, P = 0.84 | ||
| c-statistics | 0.914 | 0.917 | ||