Number of LWBS for the control (2016) and study (2017) periods, overall and by CTAS level: There were 0 LWBS at CTAS level 1 for both years across all months.
| MONTH | 2016 | LWBS, N | 2017 | P VALUE* | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| LWBS, N | LWBS BY CTAS LEVEL, N (%) | LWBS BY CTAS LEVEL, N (%) | |||||||||
| 2 | 3 | 4 | 5 | 2 | 3 | 4 | 5 | ||||
| July | 273 | 18 (6.6) | 129 (47.3) | 109 (40.0) | 17 (6.2) | 178 | 13 (7.3) | 124 (69.7) | 36 (20.2) | 5 (2.8) | < .01 |
| August | 260 | 12 (4.6) | 120 (46.2) | 118 (45.4) | 10 (3.8) | 182 | 13 (7.1) | 88 (48.4) | 74 (40.7) | 7 (3.8) | .60 |
| September | 195 | 8 (4.1) | 100 (51.3) | 80 (41.0) | 7 (3.6) | 165 | 13 (7.9) | 85 (51.5) | 62 (37.6) | 5 (3.0) | .47 |
| October | 224 | 17 (7.6) | 104 (46.4) | 97 (43.3) | 6 (2.7) | 158 | 14 (8.9) | 70 (44.3) | 68 (43.0) | 6 (3.8) | .65 |
| November | 210 | 14 (6.7) | 98 (46.7) | 88 (41.9) | 10 (4.8) | 173 | 24 (13.9) | 86 (49.7) | 54 (31.2) | 9 (5.2) | .04 |
| December | 251 | 10 (4.0) | 138 (55.0) | 93 (37.1) | 10 (4.0) | 118 | 10 (8.5) | 59 (50.0) | 36 (30.5) | 13 (11.0) | .01 |
| Total | 1413 | 79 (5.6) | 689 (48.8) | 585 (41.4) | 60 (4.2) | 974 | 87 (8.9) | 512 (52.6) | 330 (33.9) | 45 (4.6) | < .01 |
CTAS—Canadian Triage and Acuity Scale, LWBS—patients who left without being seen.
↵*P values from χ2 tests comparing the distribution of LWBS by CTAS level in 2016 and 2017.