Table 2.
Characteristics of the 4 body mass index (BMI) groupsa
| Characteristic | Underweight BMI < 19 (n = 197) | Normal weight 19 ≤ BMI < 25 (n = 470) | Obese 25 ≤ BMI < 40 (n = 1277) | Extremely obese 40 ≤ BMI (n = 688) |
|---|---|---|---|---|
| Sex | ||||
| Female | 75 (38.1) | 188 (40) | 519 (40.6) | 415 (60.3) |
| Male | 122 (61.9) | 282 (60) | 758 (59.4) | 273 (39.7) |
|
| ||||
| Race/ethnicity | ||||
| White | 151 (77) | 381 (81.6) | 1067 (85.4) | 527 (77.7) |
| Nonwhite | 45 (23) | 86 (18.4) | 183 (14.6) | 151 (22.3) |
|
| ||||
| White | 151 (79.9) | 381 (83.2) | 1067 (87.5) | 527 (79.6) |
| Black | 38 (20.1) | 77 (16.8) | 152 (12.5) | 135 (20.4) |
|
| ||||
| Disposition | ||||
| Alive | 158 (81) | 412 (88.2) | 1151 (90.6) | 576 (84.3) |
| Died | 37 (19) | 55 (11.8) | 120 (9.4) | 107 (15.7) |
|
| ||||
| Pressure ulcer | ||||
| Present | 17 (8.6) | 26 (5.5) | 36 (2.8) | 68 (9.9) |
| Absent | 180 (91.4) | 444 (94.5) | 1241 (97.2) | 620 (90.1) |
|
| ||||
| Age, mean (SD), y | 58.3 (16.4) | 59.6 (18.1) | 58.4 (15.3) | 55.1 (15.3) |
|
| ||||
| Weight,b mean (SD), lb | 122.3 (24.5) | 149.4 (28.4) | 202.7 (39.5) | 325.4 (87.6) |
|
| ||||
| Days in intensive care unit, mean (SD) | 8 (6.3) | 8.4 (7.3) | 9 (7.0) | 10 (10.6) |
|
| ||||
| Braden total score, mean (SD) | 13.1 (3.0) | 14 (3.5) | 14 (3.6) | 13 (3.0) |
a
Some numbers in the columns do not add up to 2632 because of missing data. Values in columns are number (%) of patients unless otherwise indicated. BMI calculated as weight in kilograms divided by height in meters squared.
b
To convert to kilograms, divide by 2.2.