Table 5.
Effect of BUN Levels on LOS by Subgroups
| Characteristics | N | (β) 95% CI | P-value | P (Interaction) |
|---|---|---|---|---|
| Age | 0.7690 | |||
| 47–75 | 388 | 0.12 (−0.02, 0.26) | 0.0846 | |
| 76–82 | 390 | 0.16 (0.00, 0.32) | 0.0460 | |
| 83–105 | 448 | 0.10 (−0.00, 0.20) | 0.0601 | |
| Gender | 0.0104 | |||
| Male | 1105 | 0.18 (0.10, 0.27) | <0.0001 | |
| Female | 121 | −0.05 (−0.15, 0.04) | 0.2916 | |
| Steroid | 0.5770 | |||
| No | 575 | 0.12 (0.02, 0.21) | 0.0163 | |
| Yes | 651 | 0.16 (0.05, 0.26) | 0.0036 | |
| RR group | 0.2809 | |||
| 0–21 | 372 | 0.25 (0.10, 0.40) | 0.0008 | |
| 22–25 | 338 | 0.10 (−0.03, 0.23) | 0.1396 | |
| 26–81 | 408 | 0.13 (0.00, 0.25) | 0.0485 | |
| AMS | 0.0288 | |||
| No | 1028 | 0.18 (0.10, 0.27) | <0.0001 | |
| Yes | 194 | 0.01 (−0.14, 0.16) | 0.9253 | |
| HR group | 0.7309 | |||
| 30–91 | 390 | 0.16 (0.04, 0.29) | 0.0119 | |
| 92–108 | 403 | 0.15 (0.05, 0.26) | 0.0035 | |
| 109–200 | 419 | 0.09 (−0.07, 0.25) | 0.2625 | |
| Fever | 0.0248 | |||
| No | 939 | 0.18 (0.10, 0.26) | <0.0001 | |
| Yes | 287 | −0.04 (−0.20, 0.12) | 0.6096 | |
| Stability | <0.0001 | |||
| No | 202 | −0.092 (−0.252, 0.069) | 0.2626 | |
| Yes | 1024 | 0.235 (0.154, 0.317) | <0.0001 | |
| Discharge | <0.0001 | |||
| No | 88 | −0.357 (−0.643, −0.072) | 0.0162 | |
| Yes | 1138 | 0.208 (0.134, 0.281) | <0.0001 | |
| Intubation | 0.9303 | |||
| No | 1216 | 0.125 (0.055, 0.195) | 0.0005 | |
| Yes | 9 | 0.15 (−0.30, 0.59) | 0.5188 | |
| Full assisting in daily activities | 0.8599 | |||
| No | 1048 | 0.110 (0.031, 0.188) | 0.0061 | |
| Yes | 178 | 0.125 (−0.061, 0.310) | 0.1907 | |
| Wheezing lung sound | 0.3701 | |||
| No | 846 | 0.158 (0.064, 0.251) | 0.001 | |
| Yse | 380 | 0.086 (−0.010, 0.183) | 0.0793 |