Table 1.
Baseline and perioperative characteristics of the groups with and without postinduction and intraoperative hypotension
| Postinduction hypotension | Intraoperative hypotension | |||||
|---|---|---|---|---|---|---|
| Any N = 11,627 |
None N = 2,583 |
SMD | Any N = 11,975 |
None N = 2,235 |
SMD | |
| Age (yr), median [IQR] | 67 [53–75] | 57 [44–70] | 0.43 | 67 [52–75] | 58 [45–70] | 0.38 |
| Female, n/total N (%) | 6,316/11,627 (54%) | 964/2,583 (37%) | 0.35 | 6,308/11,975 (53%) | 972/2,235 (44%) | 0.19 |
| Height (cm), median [IQR] | 160 [153–166] | 164 [157–170] | 0.40 | 160 [153–166] | 162 [156–169] | 0.29 |
| Weight (kg), median [IQR] | 57 [50–66] | 63 [54–71] | 0.37 | 58 [50–66] | 62 [53–70] | 0.29 |
| BMI (kg·m−2), median [IQR] | 23 [20–25] | 23 [21–26] | 0.20 | 23 [20–25] | 23 [21–26] | 0.17 |
| ASA-PS, n/total N (%) | 0.18 | 0.21 | ||||
| I | 1,948/11,627 (17%) | 607/2,583 (24%) | 2,033/11,975 (17%) | 522/2,235 (23%) | ||
| II | 8,123/11,627 (70%) | 1,706/2,583 (66%) | 8,310/11,975 (69%) | 1,519/2,235 (68%) | ||
| III | 1,434/11,627 (12%) | 248/2,583 (10%) | 1,502/11,975 (13%) | 180/2,235 (8%) | ||
| IV | 122/11,627 (1%) | 22/2,583 (0.9%) | 130/11,975 (1%) | 14/2,235 (0.6%) | ||
| Emergency, n/total N (%) | 840/11,627 (7%) | 189/2,583 (7%) | 0.004 | 876/11,975 (7%) | 153/2,235 (7%) | 0.02 |
| TIVA, n/total N (%) | 6,178/11,627 (53%) | 1,241/2,583 (48%) | 0.10 | 6,164/11,975 (52%) | 1,255/2,235 (56%) | 0.09 |
| Neuraxial anesthesia, n/total N (%) | 2,538/11,627 (22%) | 292/2,583 (11%) | 0.29 | 2,670/11,975 (22%) | 160/2,235 (7%) | 0.44 |
| Epidural anesthesia, n/total N (%) | 2,533/11,627 (22%) | 289/2,583 (11%) | 0.29 | 2,664/11,975 (22%) | 158/2,235 (7%) | 0.44 |
| Spinal anesthesia, n/total N (%) | 5/11,627 (0.04%) | 3/2,583 (0.1%) | 0.03 | 6/11,975 (0.05%) | 2/2,235 (0.09%) | 0.02 |
| Peripheral nerve block, n/total N (%) | 995/11,627 (9%) | 196/2,583 (8%) | 0.04 | 1,007/11,975 (8%) | 184/2,235 (8%) | 0.006 |
| Surgical risk, n/total N (%) | 0.13 | 0.30 | ||||
| Low | 2,256/11,627 (19%) | 556/2,583 (22%) | 2,232/11,975 (19%) | 580/2,235 (26%) | ||
| Intermediate | 8,482/11,627 (73%) | 1,905/2,583 (74%) | 8,784/11,975 (73%) | 1,603/2,235 (72%) | ||
| High | 889/11,627 (8%) | 122/2,583 (5%) | 959/11,975 (8%) | 52/2,235 (2%) | ||
| Induction duration (min), median [IQR] | 42 [33–52] | 37 [30–46] | 0.32 | 42 [33–52] | 37 [30–46] | 0.33 |
| Anesthesia duration (min), median [IQR] | 227 [159–327] | 198 [143–268] | 0.29 | 230 [162–330] | 179 [134–246] | 0.52 |
| Surgery duration (min), median [IQR] | 167 [106–259] | 144 [97–209] | 0.27 | 171 [108–263] | 126 [87–186] | 0.51 |
ASA-PS = American Society of Anesthesiologists Physical Status; BMI = body mass index; IQR = interquartile range; SMD = standardized mean difference; TIVA = total intravenous anesthesia