Table 2.
Percentage of inappropriate stays and associated factors: bivariate and multivariate analysis.
| Rate of inappropriateness | Bivariate analysis | Multivariate analysis | |||||||||||
| n | % | 95CI-LL* | 95CI-UL* | RR* | 95CI-LL* | 95CI-UL* | p | ROR* | 95CI-LL* | 95CI-UL* | p | ||
| Age | < 45 years† | 257 | 29.2 | 23.6 | 34.7 | ||||||||
| 45–65 years | 968 | 50.3 | 47.2 | 53.5 | 1.72 | 1.35 | 2.20 | <0.0001‡ | 1.98 | 1.40 | 2.81 | 0.0001‡ | |
| > 65 years | 1359 | 44.6 | 41.9 | 47.2 | 1.53 | 1.20 | 1.94 | 0.0006‡ | 1.97 | 1.38 | 2.81 | 0.0002‡ | |
| Sex | Male† | 1708 | 46.1 | 43.8 | 48.5 | ||||||||
| Female | 876 | 43.4 | 40.1 | 46.7 | 0.94 | 0.08 | 1.03 | 0.1966 | 1.05 | 0.86 | 1.29 | 0.6195 | |
| Admission | Urgent† | 1183 | 37.0 | 34.3 | 39.8 | ||||||||
| Programmed | 1401 | 52.1 | 49.5 | 54.7 | 1.40 | 1.28 | 1.53 | <0.0001‡ | 2.58 | 2.09 | 3.20 | <0.0001‡ | |
| Hospitalization length | < 7 days† | 1000 | 27.3 | 24.5 | 30.1 | ||||||||
| ≥ 7 days | 1584 | 56.5 | 54.1 | 58.9 | 2.07 | 1.85 | 2.31 | <0.0001‡ | 4.13 | 3.29 | 5.18 | <0.0001‡ | |
| Correctly documented medical records | Yes† | 649 | 35.0 | 31.3 | 38.6 | ||||||||
| No | 1932 | 48.7 | 46.5 | 50.9 | 1.39 | 1.24 | 1.56 | <0.0001‡ | 2.01 | 1.59 | 2.55 | <0.0001‡ | |
| Correctly documented nursing records | Yes† | 2474 | 45.1 | 43.1 | 47.0 | ||||||||
| No | 107 | 49.5 | 40.1 | 59.0 | 1.10 | 0.90 | 1.34 | 0.4185 | 1.21 | 0.78 | 1.88 | 0.3952 | |
| Working day | Yes† | 1971 | 41.5 | 39.3 | 43.7 | ||||||||
| No | 613 | 57.1 | 53.2 | 61.0 | 1.38 | 1.23 | 1.50 | <0.0001‡ | 1.91 | 1.56 | 2.34 | <0.0001‡ | |
| Service | Angiology and Vascular Surgery | 592 | 51.7 | 47.6 | 55.8 | 1.96 | 1.54 | 2.49 | <0.0001‡ | 1.25 | 0.95 | 1.65 | 0,1055 |
| Heart Surgery | 221 | 59.7 | 53.0 | 66.4 | 2.71 | 1.99 | 3.70 | <0.0001‡ | 1.75 | 1.25 | 2.45 | 0.0010‡ | |
| General Surgery 'Service A' | 358 | 64.3 | 58.3 | 70.4 | 1.58 | 1.21 | 2.07 | 0.0008‡ | 1.91 | 1.44 | 2.53 | <0.0001‡ | |
| General Surgery 'Service B' | 219 | 40.6 | 33.9 | 47.4 | 1.25 | 0.92 | 1.71 | 0.1580 | 1.07 | 0.76 | 1.51 | 0.7101 | |
| Laparoscopic Surgery | 103 | 32.0 | 22.5 | 41.5 | 0.86 | 0.56 | 1.32 | 0.4903 | 0.78 | 0.49 | 1.22 | 0.2743 | |
| Thoracic Surgery | 322 | 68.9 | 63.7 | 74.2 | 4.06 | 3.04 | 5.41 | <0.0001‡ | 2.52 | 1.83 | 3.49 | <0.0001‡ | |
| Gynaecology | 34 | 2.9 | 0.1 | 15.3 | 0.06 | 0.01 | 0.34 | 0.0019‡ | 0.10 | 0.02 | 0.65 | 0.0155‡ | |
| Neurosurgery | 61 | 36.1 | 23.2 | 48.9 | 1.03 | 0.62 | 1.72 | 0.9072 | 1.58 | 0.92 | 2.71 | 0.0995 | |
| Ophthalmology | 72 | 31.9 | 20.5 | 43.4 | 0.86 | 0.53 | 1.40 | 0.5404 | 0.86 | 0.51 | 1.43 | 0.5580 | |
| Otorhinolaryngology | 129 | 51.2 | 42.1 | 60.2 | 1.91 | 1.32 | 2.77 | 0.0005‡ | 0.95 | 0.64 | 1.43 | 0.8214 | |
| Traumatology | 252 | 23.4 | 18.0 | 28.8 | 0.56 | 0.40 | 0.78 | 0.0005‡ | 1.05 | 0.74 | 1.49 | 0.7858 | |
| Urology | 221 | 22.2 | 16.5 | 27.9 | 0.52 | 0.37 | 0.74 | 0.0002‡ | 0.82 | 0.56 | 1.20 | 0.3052 | |
| TOTAL | 2584 | 45.2 | 43.3 | 47.1 | |||||||||
* 95CI: 95% confidence interval; LL: lower limit; UL: upper limit; RR: relative risk; ROR: risk odds ratio. † reference category. For variable 'Service' the reference is the mean effect. ‡ statistically significant for p < 0.05.