Table 1: Patient demographic, admission, mortality and discharge characteristics across Body Mass Index (BMI) categories.
Underweight(BMI < 18.5), N = 33 | Extremely obese (BMI ≥ 40),N = 15 | All other categories(BMI 18.5 ≤ 40),N = 362 | p-value | |
Age, mean years (SD) | 69 (19) | 55 (14) | 64 (18) | 0.06 |
Female, n (%) | 22 (67) | 9 (60) | 152 (42) | 0.01 |
Clinical specialty on admission, n (%)^ Cardiology/Cardiothoracic • General Medicine • General surgery • Neurology/Neurosurgery • Orthopaedics/Rehabilitation • Other |
6 (12) 15 (31) 7 (15) 4 (8) 7 (15) 9 (19) |
45 (12.5) 74 (20) 64 (18) 58 (16) 45 (12.5) 76 (21) |
0.49 |
|
Length of stay, median days (range) | 10 (2-63) | 16 (2-39) | 9.5 (1-246) | 0.94 |
Mortality, n (%) • During hospital admission • 28-day • 1-year |
3 (9) 1 (3) 6 (21) |
0 0 3 (20) |
N/A N/A N/A |
N/A |
Discharge destination, n (%)^ • Home or usual place of care • Other hospital • In-hospital death |
37 (77) 8 (17) 3 (6) |
282 (78) 69 (19) 11 (3) |
0.33 |
|
Survivor's re-admitted to hospital, n (%) • 28-day • 1-year (one admission) • 1-year (multiple admissions) |
5 (17) 12 (52) 8 (35) |
3 (20) 6 (50) 4 (33) |
31 (8.6)* N/A N/A |
^Fisher's exact analysis performed as underweight/extremely obese vs. other BMI; *Number estimated from Australian Health Roundtable data for this hospital [11].