Table 2 Student’s t- or χ2-tests of differences between below and above median LOS for predictors in the NS sample
Means or Percentages | At Below LOS Median of the TSP | At Above LOS Median of the TSP | p-value |
|---|---|---|---|
Preoperative Factors: | |||
 Age ± s.d. | 46.56 ± 17.38 | 52.87 ± 15.91 | 0.03 |
 Gender: Male (n) | 31.80% (21) | 47.40% (37) | 0.04 |
 Race: Chinese (n) | 62.10% (41) | 67.90% (53) | 0.29 |
 Unhealthy BMI (n) | 78.80% (26) | 64.50% (20) | 0.16 |
 Braden Scale ± s.d. | 22.42 ± 1.23 | 21.39 ± 2.79 | 0.06 |
 Nutrition Score ± s.d. | 0.16 ± 0.50 | 0.38 ± 0.92 | 0.42 |
 Functional Status ± s.d. | 0.14 ± 0.68 | 1.27 ± 1.91 | < 0.001 |
 Smoking History (n) | 10.50% (4) | 12.50% (5) | 0.53 |
 Number of Comorbidities ± s.d. | 0.95 ± 0.93 | 1.24 ± 1.02 | 0.19 |
 Number of Abnormal Labs ± s.d. | 1.65 ± 1.10 | 2.75 ± 1.35 | < 0.001 |
 Number of Fall Risks ± s.d. | 0.32 ± 0.85 | 0.57 ± 0.70 | 0.02 |
 Weekend Admissions (n) | 34.80% (23) | 33.30% (26) | 0.49 |
 Admissions After 5 pm (n) | 33.30% (22) | 54.70% (41) | 0.01 |
 Referral to OT (n) | 11.10% (4) | 32.40% (11) | 0.03 |
 Referral to PT (n) | 13.90% (5) | 35.30% (12) | 0.04 |
 Number of Delays ± s.d. | 1.40 ± 1.73 | 1.39 ± 1.69 | 0.60 |
Intraoperative Factors: | |||
 Preparation Duration ± s.d. | 1:07:43 ± 0:24:03 | 1:15:08 ± 0:26:48 | 0.09 |
 Operation Duration ± s.d. | 1:40:52 ± 0:58:15 | 2:27:16 ± 1:55:03 | <0.001 |
 Operation End After 5 pm (n) | 15.20% (10) | 17.90% (14) | 0.41 |
Postoperative Factors: | |||
 Number of Insertions ± s.d. | 0.85 ± 1.04 | 1.18 ± 1.35 | 0.24 |
 Number of HAI ± s.d. | 0. 05 ± 0.23 | 0.55 ± 0.83 | < 0.001 |
 Number of Medications ± s.d. | 0.08 ± 0.36 | 0.56 ± 0.82 | < 0.001 |
 Weekend Discharge (n) | 37.90% (25) | 24.40% (19) | 0.06 |
 Discharged After 5 pm (n) | 18.20% (12) | 36.80% (28) | 0.01 |