Table 2.
Provider, patient and case information for analyzed data
| Baseline | Intervention | Standardized Difference | |
|---|---|---|---|
|
| |||
| n | 62,371 (68.9%) | 28,096 (31.1%) | |
| Provider | 0.20 | ||
| Resident | 16,183 (48.3%) | 6,099 (35.7%) | |
| CRNA | 10,318 (30.8%) | 6,713 (39.3%) | |
| Attending Alone | 5,860 (17.5%) | 3,504 (20.5%) | |
| Dual Attendings | 58 (0.2%) | 31 (0.2%) | |
| Resident/CRNA | 1,060 (3.2%) | 726 (4.3%) | |
| Patient Age (years) | 48 ± 23 | 49 ± 23 | 0.04 |
| Pediatric vs. Adult Patient | 0.04 | ||
| Age≥18 | 52,150 (83.6%) | 23,885 (85.0%) | |
| Age<18 | 10,221 (16.4%) | 4,211 (15.0%) | |
| Patient Gender | 0.01 | ||
| Female | 31,093 (49.9%) | 14,203 (50.6%) | |
| Male | 31,265 (50.1%) | 13,873 (49.4%) | |
| Anesthetic Agent | 0.68 | ||
| Desflurane | 17,472 (28.0%) | 1,185 (4.2%) | |
| Sevoflurane | 44,899 (72.0%) | 26,911 (95.8%) | |
| Case Length (hours) | 3.3 ± 2.1 | 3.4 ± 2.3 | 0.03 |
| Short or Long Case | 0.01 | ||
| <2 hours | 20,343 (32.6%) | 9,029 (32.1%) | |
| ≥2 hours | 42,028 (67.4%) | 19,067 (67.9%) | |
| Hospital Site | 0.00 | ||
| Parnassus | 33,541 (53.8%) | 15,043 (53.5%) | |
| Mission Bay | 22,059 (35.4%) | 10,130 (36.1%) | |
| Mount Zion | 6,771 (10.9%) | 2,923 (10.4%) | |
Data are mean ± SD, or n(%)
CRNA, certified registered nurse anesthetist
Standardized difference is the difference in means or proportions divided by the standard deviation and calculates potential imbalance in groups; 0.2 = small, 0.5 = medium, 0.8 = large imbalance.