Table 2.
Logistic Regression Models for 1- and 3-Month Mortality for Dutch and US Residents with Lower Respiratory Tract Infections
| 1-Month Mortality | 3-Month Mortality | |||
| Variable | Parameter Estimate | Odds Ratio (95% CI) | Parameter Estimate | Odds Ratio (95% CI) |
| Intercept | −7.020 | −7.302 | ||
| Age* | 0.023 | 1.25 (0.99 – 1.59) | 0.029 | 1.34 (1.08 – 1.65) |
| Bladder incontinence at time of diagnosis† | 0.248 | 1.28 (1.05 – 1.57) | ||
| Congestive heart failure | 0.330 | 1.39 (1.03 – 1.88) | ||
| Decreased alertness | 0.465 | 1.59 (1.15 – 2.20) | 0.375 | 1.46 (1.09 – 1.94) |
| Dehydrated | 0.488 | 1.63 (1.17 – 2.27) | 0.452 | 1.57 (1.16 – 2.12) |
| Eating self-performance at time of diagnosis‡ | 0.442 | 1.56 (1.21 – 2.00) | 0.314 | 1.37 (1.09 – 1.71) |
| Facility has 300 or more beds | 0.515 | 1.67 (1.01 – 2.76) | ||
| Male | 0.576 | 1.78 (1.27 – 2.49) | 0.731 | 2.08 (1.54 – 2.79) |
| Walking self-performance at diagnosis | 0.398 | 1.49 (1.14 – 1.95) | ||
| Walking self-performance at diagnosis, squared | 0.193 | 1.21 (1.07 – 1.37) | ||
| New or increased cough | −0.536 | 0.58 (0.41 – 0.84) | −0.497 | 0.61 (0.44 – 0.85) |
| Parkinson’s disease | 0.596 | 1.81 (1.11 – 2.97) | 0.477 | 1.61 (1.03 – 2.52) |
| Pulse* | 0.021 | 1.24 (1.13 – 1.36) | 0.015 | 1.16 (1.07 – 1.26) |
| Respiratory distress | 0.781 | 2.18 (1.59 – 3.00) | 0.469 | 1.60 (1.20 – 2.13) |
| Respiratory rate* | 0.016 | 1.17 (0.97 – 1.43) | ||
| C statistic | 0.765 | 0.737 | ||
| Hosmer-Lemeshow goodness-of-fit statistic, P§ | 0.90 | 0.64 | ||
CI = confidence interval.
* The odds ratios shown for age, pulse, and respiratory rate are for 10-unit change.
† Coding for bladder incontinence is as follows: 1 = continent, 2 = usually continent, 3 = incontinent 2 or more times a week.
‡ Coding for eating dependency is as follows: 0 = independent, 1= requires assistance, 2 = fully dependent.
§ A nonsignificant P value indicates good fit over the range of mortality risk.