Table 1.
Univariate analysis: patient-related risk factors for postoperative hypothermia after brachial plexus block
| Variable | Normothermia (n = 392) |
Hypothermia (n = 268) |
P |
|---|---|---|---|
| Baseline core temperature, °C | 36.8 [36.6-36.9] | 36.7 [36.6-36.9] | 0.053 |
| Age, years | 66 [56-75] | 64 [57-74] | 0.663 |
| Sex, male/female | 154/238 | 127/141 | 0.039 |
| Weight, kg | 60 [52.5-69] | 61.2 [54-70] | 0.661 |
| Height, cm | 157 [150-165] | 158 [151-167] | 0.429 |
| Body mass index (kg/m2) | 24.4 [22.2-26.7] | 24.1 [22.1-26.5] | 0.511 |
| ASA physical status (I/II/III) | 33/262/97 | 23/192/53 | 0.322 |
| Patient comorbidities | |||
| Hypertension | 184 (46.9%) | 129 (48.1%) | 0.763 |
| Diabetes mellitus | 96 (24.5%) | 59 (22.0%) | 0.461 |
| Hypothyroidism | 3 (0.8%) | 4 (1.5%) | 0.450 |
| Pulmonary disease | 14 (3.6%) | 13 (4.9%) | 0.415 |
| Current smokers | 50 (12.8%) | 39 (14.6%) | 0.507 |
| Alcohol abuse | 9 (2.3%) | 17 (6.3%) | 0.013 |
Values are presented as median [interquartile ranges], numbers, or number (%). ASA, American Society of Anesthesiologists.