Table 2.
Odds ratio in the prediction model (univariate analysis)
| Variable | New group (n = 20,309) | Existing group (n = 9,148) | |||
|---|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | ||
| Sex | |||||
| Male | Ref | Ref | |||
| Female | 0.663 (0.550, 0.800) | < .0001 | 0.620 (0.501, 0.767) | < .0001 | |
| Age (years) | |||||
| 0–19 | Ref | Ref | |||
| 20–64 | 0.908 (0.647, 1.274) | 0.5766 | 1.713 (1.056, 2.780) | 0.0293 | |
| 65–74 | 1.663 (1.180, 2.344) | 0.0037 | 2.233 (1.367, 3.647) | 0.0013 | |
| 74 < | 2.496 (1.807, 3.448) | < .0001 | 1.994 (1.213, 3.278) | 0.0065 | |
| BMI | |||||
| < 18.5 | Ref | Ref | |||
| 18.5 to < 25.0 | 0.695 (0.557, 0.868) | 0.0013 | 0.498 (0.394, 0.630) | < .0001 | |
| 25.0 to < 30.0 | 0.634 (0.478, 0.841) | 0.0016 | 0.285 (0.200, 0.404) | < .0001 | |
| 30.0 to < 35.0 | 0.523 (0.299, 0.914) | 0.0230 | 0.382 (0.209, 0.700) | 0.0018 | |
| 35.0 to < 40.0 | 0.355 (0.087, 1.449) | 0.1490 | 0.406 (0.098, 1.683) | 0.2142 | |
| 40 ≤ | 0.413 (0.057, 2.994) | 0.3814 | 0.374 (0.051, 2.764) | 0.3355 | |
| Smoke | |||||
| No | Ref | Ref | |||
| Yes | 1.768 (1.470, 2.128) | < .0001 | 1.231 (0.999, 1.516) | 0.0510 | |
| ADL | |||||
| No | Ref | Ref | |||
| Yes | 11.042 (8.060, 15.126) | < .0001 | 9.633 (7.218, 12.857) | < .0001 | |
| JCS | |||||
| No | Ref | Ref | |||
| Yes | 11.683 (9.687, 14.091) | < .0001 | 8.260 (6.295, 10.838) | < .0001 | |
| Cancer information | |||||
| No | Ref | Ref | |||
| Yes | 1.375 (1.088, 1.737) | 0.0077 | 2.938 (2.379, 3.629) | < .0001 | |
| Operation | |||||
| No | Ref | ||||
| Yes | 0.641 (0.520, 0.791) | < .0001 | |||
| Plan change | |||||
| No | Ref | ||||
| Yes | 1.897 (1.301, 2.768) | 0.0009 | |||
| Comorbidity | |||||
| No | Ref | ||||
| Yes | 2.793 (1.483, 5.259) | 0.0015 | |||
| Post-hospital disease | |||||
| No | Ref | ||||
| Yes | 1.451 (1.024, 2.057) | 0.0363 | |||
| ADL transition | |||||
| No to no | Ref | ||||
| Yes to no | 2.200 (1.593, 3.038) | < .0001 | |||
| No to yes | 1.301 (0.898, 1.886) | 0.1641 | |||
| Yes to yes | 2.196 (1.736, 2.779) | < .0001 | |||
| JCS transition | |||||
| No to no | Ref | ||||
| Yes to no | 1.595 (0.935, 2.720) | 0.0863 | |||
| No to yes | 1.783 (0.233, 13.668) | 0.5778 | |||
| Yes to yes | 1.306 (0.474, 3.595) | 0.6054 | |||
| LHS (days) | |||||
| ≤ 7 | Ref | ||||
| 7 to ≤ 14 | 1.678 (1.220, 2.309) | 0.0015 | |||
| 14 to ≤ 21 | 1.704 (1.192, 2.438) | 0.0035 | |||
| 21 to ≤ 28 | 2.399 (1.610, 3.577) | < .0001 | |||
| 28 < | 4.209 (3.094, 5.726) | < .0001 | |||
| PTUPH (days) | |||||
| ≤ 7 | Ref | ||||
| 7 to ≤ 28 | 0.509 (0.342, 0.757) | 0.0009 | |||
| 28 < | 0.337 (0.235, 0.484) | < .0001 | |||
ADL Activities of daily living, BMI Body mass index, CI Confidence interval, JCS Japan Coma Scale, LHS Length of hospital stay, OR Odds ratio, PTUPH Passed time until present hospitalization