Table 2.
Two-year changes in HRQL scores
| Unadjusted change from baseline (mean (SD)) | Adjusted difference in differences (points (95% CI)) | ||||||
|---|---|---|---|---|---|---|---|
| Instrument | Wait-listed | Medical management | Surgical treatment | P -value a | Medical (wait-list subtracted) | Surgery (wait-list subtracted) | Surgery (medical subtracted) |
| (n = 150) | (n = 200) | (n = 150) | |||||
| SF-12 PCS | 1.0 (6.7) | 5.0 (7.1) | 6.2 (9.2) | <0.001 | 4.5 (2.9, 6.0) | 6.8 (5.1, 8.5) | 2.3 (0.7, 3.9) |
| SF-12 MCS | 0.7 (7.7) | 4.0 (9.6) | 1.0 (10.6) | 0.011 | 4.2 (2.3, 6.0) | 3.2 (1.1, 5.3) | −1.0 (−2.9, 0.9) |
| EQ-Index | 0.01 (0.17) | 0.07 (0.16) | 0.05 (0.18) | 0.002 | 0.07 (0.04, 0.10) | 0.08 (0.04, 0.11) | 0.00 (−0.03, 0.04) |
| EQ-VAS | 5.7 (19.1) | 11.1 (20.8) | 12.5 (21.7) | 0.009 | 6.9 (3.4, 10.4) | 13.6 (9.7, 17.4) | 6.7 (3.1, 10.2) |
| IWQOL-Lite Total Score | 3.2 (13.8) | 13.8 (15.5) | 26.9 (21.4) | <0.001 | 11.4 (8.1, 14.7) | 25.7 (22.1, 29.3) | 14.3 (11.0, 17.6) |
aANOVA. Comparisons adjusted for age, sex, baseline BMI and baseline HRQL score. EQ-Index, Euroqol-5D questionnaire index score; EQ-VAS, Euroqol-5D questionnaire visual analog scale score; HRQL, health-related quality of life; IWQOL-Lite, Impact of Weight on Quality of Life - Lite questionnaire; MCS, mental component summary score; PCS, physical component summary score; SF-12, Short Form 12 questionnaire.