Shift characteristics across duration of shift categories
| ≤8 h (n=121 093) | >8 and ≤12 h (n=675 630) | >12 and ≤16 h (n=61 239) | >16 and ≥24 h (n=106 267) | >24 h (n=1853) | Total (n=966 082) | |
|---|---|---|---|---|---|---|
| Overnight shifts (n, %) | 15 237 (12.58) | 156 420 (23.15) | 4900 (8.00) | 100 296 (94.38) | 1853 (100) | 101 949 (10.55) |
| Partner familiarity (median, IQR) | 3 (0, 13) | 8 (1, 21) | 11 (1, 20) | 4 (0, 11) | 6 (2, 13) | 7 (1, 19) |
| Consecutive shifts (n, %) | 10 791 (8.91) | 14 108 (2.09) | 899 (1.47) | 10 906 (10.26) | 385 (20.78) | 37 089 (3.84) |
| Hours of recovery (median, IQR) | 16 (16, 46) | 12 (12, 60) | 24 (11–59) | 48 (24, 73) | 24 (7.5, 60) | 16 (12, 60) |
| Number of shifts past 7 days (median, IQR) | 4 (3, 5) | 3 (3, 4) | 3 (2, 4) | 2 (2, 3) | 3 (2, 4) | 3 (2, 4) |
| Unique workers (n, %)* | 3490 (79.64) | 4141 (94.50) | 2144 (48.93) | 2017 (46.03) | 681 (15.54) | 4382 (100) |
| Total injuries and illnesses (n, %) | 197 (0.16) | 586 (0.09) | 49 (0.08) | 117 (0.11) | 1 (0.05) | 950 (0.10) |
| Resulting in work restriction | 12 (0.01) | 146 (0.02) | 13 (0.02) | 40 (0.04) | 1 (0.05) | 212 (0.02) |
| Resulting in time away from work | 43 (0.04) | 56 (0.01) | 6 (0.01) | 16 (0.02) | 0 (0.00) | 121 (0.01) |
*Percentage calculated using denominator of 4382 total unique emergency medical services workers in study. All other percentages are column percentages.