Table 2 Baseline characteristics of patients in each trial included in the analysis
Author (year) | BMI (kg/m2) categories | Age, years, median (SD) | Male, n (%) | APACHE III, median score (SD) | SAPS II probability of survival, % (SD) | Diabetes mellitus, n (%) | Liver disease, n (%) | Smoking, n (%) |
|---|---|---|---|---|---|---|---|---|
O’Brien 2006 [17] | Underweight | 62.4 (16.2) | 41 (46.6%) | NR | 0.53 (0.29) | 10 (11.4%) | NR | NR |
Normal | 61.0 (17.8) | 307 (56.4%) | 0.58 (0.28) | 87 (16.0%) | ||||
Overweight | 59.4 (16.7) | 223 (55.9%) | 0.59 (0.29) | 98 (24.6%) | ||||
Obese | 58.0 (16.3) | 152 (46.6%) | 0.59 (0.28) | 113 (34.7%) | ||||
Morbidly obese | 53.6 (14.9) | 44 (33.6%) | 0.68 (0.29) | 52 (39.7%) | ||||
Morris 2007 [21] | Underweight | 64.7 (18.4) | 28 (56.0%) | 82.3 (31.5) | NR | NR | NR | NR |
Normal | 61.5 (18.1) | 195 (64.8%) | 74.9 (29.2) | |||||
Overweight | 58.9 (17.4) | 157 (66.2%) | 74.9 (30.0) | |||||
Obese | 57.0 (15.9) | 116 (63.4%) | 70.3 (29.8) | |||||
Morbidly obese | 54.7 (13.9) | 26 (48.1%) | 75.0 (35.1) | |||||
Stapleton 2010 [20] | Underweight | 50.2 (16.8) | 36 (59.0%) | 97.2 (35.2) | NR | 8 (13.1%) | NR | NR |
Normal | 51.6 (17.9) | 316 (58.3%) | 89.9 (29.8) | 64 (11.8) | ||||
Overweight | 52.1 (18.3) | 267 (64.0%) | 87.2 (30.1) | 55 (13.2%) | ||||
Obese | 51.0 (15.5) | 172 (54.6%) | 83.7 (30.5) | 55 (17.5%) | ||||
Morbidly obese | 49.3 (13.1) | 23 (31.1%) | 81.5 (28.6) | 26 (35.1%) | ||||
Soto 2012 [19] | Underweight | 65.3 (17.5) | 12 (49.0%) | 80.9 (20.1) | NR | 2 (6.0%) | 3 (10.0%) | 19 (68.0%) |
Normal | 58.8 (18.8) | 147 (63.0%) | 75.4 (22.5) | 23 (10.0%) | 18 (8.0%) | 142 (71.0%) | ||
Overweight | 59.0 (18.7) | 164 (69.0%) | 75.7 (25.7) | 45 (19.0%) | 10 (4.0%) | 127 (66.0%) | ||
Obese | 56.7 (16.9) | 124 (66.0%) | 70.4 (21.1) | 50 (27.0%) | 14 (7.0%) | 107 (66.0%) | ||
Morbidly obese | 50.2 (13.9) | 26 (43.0%) | 69.1 (21.3) | 29 (45.0%) | 5 (8.0%) | 43 (61.0%) | ||
Gong 2016 [18] | Underweight | 61 (20.0) | 35 (42.0%) | 70 (22.0) | NR | 14 (17.0%) | 3 (4.0%) | NR |
Normal | 63 (18.0) | 393 (63.0%) | 70 (23.0) | 113 (18.0%) | 40 (6.0%) | |||
Overweight | 62 (17.0) | 421 (70.0%) | 69 (24.0) | 144 (24.0%) | 31 (5.0%) | |||
Obese | 60 (17.0) | 209 (57.0%) | 68 (22.0) | 140 (38.0%) | 17 (5.0%) | |||
Morbidly obese | 54 (14.0) | 58 (50.0%) | 67 (25.0) | 52 (45.0%) | 8 (7.0%) |