Table 2 Factor associated with the use of low tidal volume
All patients (n = 5719) | LTVV* (n = 3340) | No LTVV* (n = 2379) | Absolute difference** (95% CI) | p value | |
|---|---|---|---|---|---|
Related to the trial | |||||
Use of checklist | 1279 (22.4) | 843 (25.2) | 436 (18.3) | 4.41 (− 0.20 to 9.02) | 0.061 |
Related to the hospital | |||||
Tertiary | 4605 (81.5) | 2742 (83.2) | 1863 (79.1) | 5.04 (− 2.29 to 12.35) | 0.180 |
Specialty | 1060 (18.8) | 691 (21.0) | 369 (15.7) | 5.61 (− 2.89 to 14.06) | 0.197 |
University | 2202 (39.0) | 1309 (39.7) | 893 (37.9) | − 2.23 (− 8.57 to 4.12) | 0.493 |
Number of beds | |||||
< 157 | 1887 (33.4) | 1086 (32.9) | 801 (34.0) | 8.62 (2.08 to 15.17)a | 0.011 |
157–324 | 1906 (33.7) | 1041 (31.6) | 865 (36.7) | ||
> 324 | 1857 (32.9) | 1169 (35.5) | 688 (29.2) | ||
Number of ICU beds | 0.445 | ||||
< 11 | 2362 (41.8) | 1364 (41.4) | 998 (42.4) | 1.85 (− 5.17 to 8.87)b | 0.606 |
11–21 | 1774 (31.4) | 1028 (31.2) | 746 (31.7) | ||
> 21 | 1514 (26.8) | 904 (27.4) | 610 (25.9) | ||
Related to organization | |||||
Multidisciplinary rounds | 3444 (60.2) | 2068 (61.9) | 1376 (57.8) | − 0.15 (− 3.63 to 3.34) | 0.932 |
Sedation protocol | 2620 (46.4) | 1509 (45.8) | 1111 (47.2) | − 2.02 (− 8.08 to 4.02) | 0.514 |
Analgesia protocol | 2285 (40.4) | 1342 (40.7) | 943 (40.1) | 2.18 (− 3.99 to 8.37) | 0.490 |
Weaning protocol | 3644 (64.5) | 2090 (63.4) | 1554 (66.0) | − 1.36 (− 7.73 to 5.02) | 0.677 |
VAP protocol | 3621 (64.1) | 2046 (62.1) | 1575 (66.9) | − 3.58 (− 9.89 to 2.74) | 0.269 |
Board-certified consultant | |||||
None | 371 (6.6) | 204 (6.2) | 167 (7.1) | 4.11 (− 1.92 to 10.15)c | 0.185 |
Full-time | 3015 (53.4) | 1821 (55.2) | 1194 (50.7) | ||
Half-time | 2264 (40.1) | 1271 (38.6) | 993 (42.2) | ||
1:10 physician | 5466 (96.7) | 3205 (97.2) | 2261 (96.0) | 6.74 (− 8.75 to 22.22) | 0.395 |
Board-certified RT coordinator | 3920 (69.4) | 2309 (70.1) | 1611 (68.4) | − 2.69 (− 9.41 to 4.06) | 0.436 |
1:10 respiratory therapist | |||||
None | 108 (1.9) | 69 (2.1) | 39 (1.7) | − 2.53 (− 8.59 to 3.53)c | 0.415 |
Full-time | 2438 (43.2) | 1383 (42.0) | 1055 (44.8) | ||
Half-time | 3104 (54.9) | 1844 (55.9) | 1260 (53.5) | ||
1:10 nurse | 5482 (97.0) | 3227 (97.9) | 2255 (95.8) | 20.24 (3.75 to 36.76) | 0.018 |