Table 1.
Comparison of baseline variables
| Variable | All subjects combined (n=348) | Stratified by BMI status | P* | Stratified by WHR status | P* | |||
|---|---|---|---|---|---|---|---|---|
|
|
|
|||||||
| Nonobese, n=202 | Obese, n=146 | Nonobese, n=258 | Obese, n=90 | |||||
| Age, years, mean ± SD | 54.3±18.1 | 51.8±18.9 | 57.7±16.4 | 0.003 | 52.2±18.4 | 60.3±15.9 | 0.0002 | |
| Sex | ||||||||
| Male | 216 (62.1) | 132 (65.3) | 84 (57.5) | 0.14 | 171 (69.0) | 38 (42.2) | <0.0001 | |
| Female | 132 (37.9) | 70 (34.7) | 62 (42.5) | 80 (31.0) | 52 (57.8) | |||
| APACHE II score, mean ± SD | 21.9±8.4 | 20.8±8.5 | 23.5±8.1 | 0.02 | 21.0±8.3 | 24.1±8.3 | 0.02 | |
| Comorbidities | ||||||||
| Cardiac failure | Yes | 11 (4.6) | 2 (1.5) | 9 (8.7) | 0.01† | 2 (1.20 | 9 (13.4) | 0.0002† |
| No | 228 (95.4) | 134 (98.5) | 94 (91.3) | 170 (98.8) | 58 (86.6) | |||
| Respiratory failure | Yes | 17 (7.1) | 8 (5.8) | 9 (8.7) | 0.39 | 7 (4.0) | 10 (14.9) | 0.009† |
| No | 223 (92.9) | 129 (94.2) | 94 (91.3) | 166 (96.0) | 57 (85.1) | |||
| Renal failure | Yes | 17 (7.1) | 8 (5.8) | 9 (8.7) | 0.39 | 8 (4.6) | 9 (13.4) | 0.02† |
| No | 223 (92.9) | 129 (94.2) | 94 (91.3) | 165 (95.4) | 58 (86.6) | |||
| Hepatic failure | Yes | 9 (3.8) | 4 (2.9) | 5 (4.9) | 0.51† | 5 (2.9) | 4 (6.0) | 0.27† |
| No | 230 (96.2) | 132 (97.1) | 98 (95.1) | 167 (97.1) | 63 (94.0) | |||
| Immunocom promised | Yes | 14 (5.9) | 10 (7.3) | 4 (4.0) | 0.28 | 11 (6.4) | 3 (4.6) | 0.76† |
| No | 224 (94.1) | 127 (92.7) | 97 (96.0) | 162 (93.6) | 62 (95.4) | |||
| Admission diagnosis | ||||||||
| Medical | 166 (48.4) | 90 (45.5) | 76 (52.4) | 0.03‡ | 113 (44.7) | 53 (58.9) | 0.01‡ | |
| Surgical | 88 (25.7) | 46 (23.2) | 42 (29.0) | 64 (25.3) | 24 (26.7) | |||
| Trauma | 89 (25.9) | 62 (31.3) | 27 (18.6) | 76 (30.0) | 13 (14.4) | |||
| BMI, mean ± SD | 29.8±7.0 | 25.1±2.9 | 36.3±5.8 | 26.9±4.4 | 38.0±6.7 | |||
| WHR, mean ± SD | 0.61±0.12 | 0.54±0.07 | 0.71±0.10 | 0.56±0.07 | 0.77±0.09 | |||
Data presented as n (%) unless otherwise specified. Body mass index (BMI): nonobese 18.5 kg/m2 to 29.9 kg/m2; obese ≥30 kg/m2; Waist-to-height ratio (WHR): nonobese ≤75th percentile; obese >75th percentile.
Nonobese vs obese;
Based on Fisher’s exact test due to small expected cell sizes;
Pairwise comparison BMI: medical versus surgical = 0.77, surgical versus trauma = 0.02, medical versus trauma =0.02; WHR: medical versus surgical = 0.44, surgical versus trauma = 0.04, medical versus trauma = 0.003. Continuous variables compared by two-sided, two-sample t test; categorical proportions compared by χ2 test with exceptions for Fisher’s exact as noted. Cell counts within categorical variables may not sum to n due to missing values. APACHE Acute Physiology and Chronic Health Evaluation