Table 3 Baseline characteristics according to weight change in patients with BMI ≥ 30 kg/m2
Overall (n = 809) | Weight unchanged (n = 707) | Lost ≥ 5% baseline weight (n = 102) | |
|---|---|---|---|
Gender, n (%) | |||
Female | 551 (68.1) | 476 (67.3) | 75 (73.5) |
Male | 258 (31.9) | 231 (32.7) | 27 (26.5) |
Age, years, mean (SD) | 65.8 (9.26) | 65.7 (9.38) | 66.0 (8.44) |
Baseline BMI, (kg/m2), mean (SD) | 37.0 (5.75) | 36.9 (5.69) | 38.2 (6.03) |
Surgery type, n (%) | |||
Total hip arthroplasty | 193 (23.9) | 171 (24.2) | 22 (21.6) |
Total knee arthroplasty | 616 (76.1) | 536 (75.8) | 80 (78.4) |
Unilateral | 792 (97.9) | 690 (97.6) | 102 (100) |
Bilateral | 17 (2.1) | 17 (2.4) | 0 (0) |
ASA, n (%) | |||
1 | 19 (2.3) | 14 (2.0) | 5 (4.9) |
2 | 347 (42.9) | 303 (42.9) | 44 (43.1) |
3 | 277 (34.2) | 241 (34.1) | 36 (35.3) |
4 | 5 (0.6) | 5 (0.7) | 0 (0) |
Missing | 161 (19.9) | 144 (20.4) | 17 (16.7) |
Comorbidities | |||
Low back pain | 339 (41.9) | 294 (41.6) | 45 (44.1) |
Other lower limb joint problem | 316 (39.1) | 268 (37.9) | 48 (47.1) |
Heart disease | 315 (38.9) | 270 (38.2) | 45 (44.1) |
Hypertension | 563 (69.6) | 491 (69.4) | 72 (70.6) |
Diabetes | 258 (31.9) | 222 (31.4) | 36 (35.3) |
Stomach or GIT condition | 162 (20.0) | 148 (20.9) | 14 (13.7) |
Lung disease | 168 (20.8) | 146 (20.7) | 22 (21.6) |
Renal failure | 66 (8.2) | 58 (8.2) | 8 (7.8) |
Liver disease | 12 (1.5) | 11 (1.6) | 1 (1.0) |
Neurological condition | 47 (5.8) | 40 (5.7) | 7 (6.9) |
Depression | 131 (16.2) | 114 (16.1) | 17 (16.7) |
Baseline HOOS/KOOS, mean (SD) | |||
Pain | 30.9 (16.9) | 30.3 (16.2) | 35.1 (21.1) |
Symptoms | 33.9 (18.5) | 33.4 (18.2) | 37.7 (20.3) |
Activities of daily living | 31.7 (17.3) | 31.3 (17.0) | 34.7 (19.3) |
Sport | 12.6 (19.3) | 12.3 (19.2) | 14.3 (20.2) |
Quality of life | 17.9 (15.9) | 17.7 (16.0) | 19.9 (14.6) |
Total | 32.1 (16.6) | 31.7 (16.2) | 34.9 (19.1) |
Baseline EQ-VAS, mean (SD) | 56.8 (23.3) | 57.3 (22.9) | 53.5 (25.4) |
Education, n (%) | |||
Certificate | 20 (2.5) | 15 (2.1) | 5 (4.9) |
Graduate Degree | 18 (2.2) | 16 (2.3) | 2 (2.0) |
No Formal Schooling | 51 (6.3) | 43 (6.1) | 8 (7.8) |
Post-Graduate Degree | 12 (1.5) | 10 (1.4) | 2 (2.0) |
Unknown | 23 (2.8) | 22 (3.1) | 1 (1.0) |
Year 10 or Equivalent | 439 (54.3) | 390 (55.2) | 49 (48.0) |
Year 12 or Equivalent | 119 (14.7) | 104 (14.7) | 15 (14.7) |
Year 6 or Equivalent | 127 (15.7) | 107 (15.1) | 20 (19.6) |
Preferred language, n (%) | |||
English | 519 (64.2) | 452 (63.9) | 67 (65.7) |
Other | 290 (35.8) | 255 (36.1) | 35 (34.3) |