Table 4.
Multiple regression model of hospital length of stay for patients in the United States (excluding outliers)
| Clinical Characteristic | Estimate | Standard Error | Wald 95% Confidence Limits | Wald Chi-Square | Pr > Chi Square |
|---|---|---|---|---|---|
| BMI | |||||
| ≥ 20 - < 25 | 0.0151 | 0.1060 | −0.1926 - 0.2228 | 0.0202 | .887 |
| ≥ 25 - < 30 | −0.0419 | 0.1039 | −0.2455 - 0.1617 | 0.1624 | .687 |
| ≥ 30 - < 35 | −0.0808 | 0.1076 | −0.2917 - 0.1301 | 0.564 | .453 |
| ≥ 35 | −0.2070 | 0.1053 | −0.4134 -0.0007 | 3.8658 | .049 |
| Number of Opioids | |||||
| > 1 - < 4 | −0.2885 | 0.0672 | −0.4202 - 0.1568 | 18.4243 | <.0001 |
| ≥ 4 | −0.3768 | 0.0715 | −0.5171 -0.2366 | 27.7411 | <.0001 |
| High risk surgery | 0.2468 | 0.0706 | 0.1084–0.3851 | 12.223 | .0005 |
| Open surgery | 0.1921 | 0.0643 | 0.0661–0.3181 | 8.9292 | .003 |
| Length of surgery (hr) | |||||
| ≥ 2 - < 4 | 0.1932 | 0.0468 | 0.1016–0.2849 | 17.0719 | <.0001 |
| ≥ 4 | 0.5523 | 0.0491 | 0.4562–0.6485 | 126.7597 | <.0001 |
| ≥1 Respiratory Depression Episode | 0.0846 | 0.0374 | 0.0112–0.1579 | 5.1058 | .024 |
| Hypertension | −0.0964 | 0.0379 | −0.1707 - 0.0221 | 6.4728 | .011 |
| Chronic Heart Failure | 0.2964 | 0.1116 | 0.0777–0.5152 | 7.0546 | .008 |
| Sepsis | 0.5316 | 0.1083 | 0.3193–0.744 | 24.0798 | <.0001 |
Pearson Chi-Square/DF = 1.46
Abbreviations: BMI body mass index