HUI3 disability categories* by trial arm
| Disability category | Control group n (%) | Hypothermia group n (%) |
| 1: No disability | 26 (39) | 39 (54) |
| 2: Mild disability | 10 (15) | 8 (11) |
| 3: Moderate disability | 6 (9) | 7 (10) |
| 4: Severe disability | 24 (36) | 18 (25) |
| Total | 66 (100) | 72 (100) |
| Missing | 4 | 3 |
| Test for trend | 1.72, P=0.085 | |
Disability categories described as follows:
Level 1: no disability or perfect health. The associated utility score value is 1.00, and all attributes (dimensions or domains) of health status are at their highest functional level (level 1).
Level 2: mild disability. The associated utility scores range from 0.89 to 0.99, and at least one attribute is at reduced level of function that can be readily corrected and/or does not prevent any activities.
Level 3: moderate disability. The associated utility score ranges from 0.70 to 0.88, and at least one attribute is at reduced level of function that cannot be corrected and/or prevents some activities.
Level 4: severe disability. The associated utility score is less than 0.70, and at least one attribute is at reduced level of function that cannot be corrected and prevents many activities.
*Category labels and descriptions taken from: Feng et al.29
HUI, Health Utilities Index.