The adjusted association between weekly work hours, extended duration shifts and resident physician-reported adverse safety outcomes
| N cases | N person months | WWH | EDS | Combined categorical WWH and EDS | |||||||||
| ≤80 | >80 | None | ≥1 | ≤80 WWH No EDS | ≤80 WWH ≥1 EDS | >80 WWH No EDS | >80 WWH ≥1 EDS | ||||||
| Attentional failures | 26 576 | 78 101 | Ref | 2.15 (2.04 to 2.26) | * | Ref | 2.17 (2.03 to 2.32) | * | Ref | 2.06 1.92 to 2.21) | 1.95 (1.79 to 2.13) | 3.69 (3.42 to 3.98) | * |
| Medical errors | 25 166 | 78 101 | Ref | 2.07 (1.97 to 2.18) | * | Ref | 1.83 (1.71 to 1.95) | * | Ref | 1.86 (1.74 to 2.00) | 2.18 (2.00 to 2.37) | 3.07 (2.85 to 3.32) | * |
| PAE | 1673 | 78 101 | Ref | 2.07 (1.82 to 2.35) | * | Ref | 1.62 (1.38 to 1.89) | * | Ref | 1.63 (1.36 to 1.94) | 2.37 (1.94 to 2.88) | 2.67 (2.22 to 3.19) | * |
| Fatal PAE | 274 | 78 101 | Ref | 1.32 (0.97 to 1.78) | Ref | 1.88 (1.25 to 2.84) | † | Ref | 2.05 (1.34 to 3.14) | 1.77 (0.99 to 3.14) | 2.01 (1.28 to 3.15) | † | |
All models adjusted for age, gender, specialty, hours in patient care, community versus university programme and cohort. Created by the authors.
*P<0.001.
†P=0.002.
EDS, extended duration shifts; PAE, preventable adverse event; Ref, reference; WWH, weekly work hours.