Table 4.
Postoperative measured changes compared to the Dutch benchmark
| (a) | |||||||
|---|---|---|---|---|---|---|---|
| Sleeve gastrectomy | Roux-en-Y gastric bypass | Dutch reference group | |||||
| n = 965 | n = 3899 | ||||||
| Mean ± SD | % | p-value | Mean ± SD | % | p-value | Mean ± SD | |
| Physical functioning | 86.02 ± 19.66 | + 3.5 | < 0.001 | 88.76 ± 17.69 | + 6.8* | < 0.001* | 83.09 ± 20.39 |
| Social functioning | 85.02 ± 21.32 | − 2.7 | 0.002 | 85.40 ± 22.05 | − 2.2 | < 0.001 | 87.35 ± 19.74 |
| Physical role limitations | 84.73 ± 29.21 | + 5.6* | < 0.001* | 85.19 ± 30.36 | + 6.2* | < 0.001* | 80.24 ± 34.84 |
| Emotional role limitations | 86.41 ± 29.90 | + 1.9 | 0.128 | 87.43 ± 29.72 | + 3.1 | < 0.001 | 84.79 ± 31.46 |
| Mental health | 79.12 ± 17.01 | + 2.8 | < 0.001 | 80.44 ± 16.96 | + 4.5 | < 0.001 | 77.00 ± 18.66 |
| Vitality | 65.53 ± 18.98 | − 3.0 | 0.002 | 67.09 ± 19.92 | − 0.7 | 0.241 | 67.59 ± 19.82 |
| Pain | 79.55 ± 25.15 | − 2.0 | 0.072 | 80.49 ± 24.27 | − 0.8 | 0.217 | 81.14 ± 24.37 |
| General health perception | 55.50 ± 16.11 | − 22.8* | < 0.001* | 59.74 ± 14.76 | − 17.0* | < 0.001* | 71.95 ± 21.60 |
| Health change | 93.21 ± 16.29 | + 77.1* | < 0.001* | 94.76 ± 15.97 | + 80.0* | < 0.001* | 52.63 ± 18.50 |
| (b) | |||||||
|---|---|---|---|---|---|---|---|
| Postoperative complication | Unsuccessful %TWL | Dutch reference group | |||||
| n = 119 | n = 696 | ||||||
| Mean ± SD | % | p-value** | Mean ± SD | % | p-value** | Mean ± SD | |
| Physical functioning | 80.58 ± 27.29 | − 3.0 | < 0.001 | 82.42 ± 21.50 | − 0.8 | < 0.001 | 83.09 ± 20.39 |
| Social functioning | 77.90 ± 30.93 | − 10.8* | 0.003* | 81.11 ± 23.50 | − 7.4* | 0.001* | 87.35 ± 19.74 |
| Physical role limitations | 75.64 ± 39.88 | – 5.7* | 0.005* | 79.43 ± 33.80 | − 1.0 | 0.002 | 80.24 ± 34.84 |
| Emotional role limitations | 83.71 ± 33.91 | − 1.27 | 0.292 | 79.16 ± 36.18 | − 6.6* | < 0.001* | 84.79 ± 31.46 |
| Mental health | 78.90 ± 18.81 | + 2.5 | 0.500 | 76.38 ± 17.57 | + 0.8 | < 0.001 | 77.00 ± 18.66 |
| Vitality | 61.92 ± 22.48 | − 8.4* | 0.027* | 63.47 ± 19.98 | − 6.1* | 0.004* | 67.59 ± 19.82 |
| Pain | 70.51 ± 30.66 | − 13.1* | < 0.001* | 76.72 ± 25.51 | − 5.4* | 0.015* | 81.14 ± 24.37 |
| General health perception | 55.74 ± 16.02 | − 22.5* | 0.060* | 53.46 ± 16.37 | − 25.7* | < 0.001* | 71.95 ± 21.60 |
| Health change | 88.46 ± 23.73 | + 68.1* | 0.001* | 89.72 ± 21.88 | + 70.5* | < 0.001* | 52.63 ± 18.50 |
(a) Represents the postoperative adjusted baseline scale scores for sleeve gastrectomy and Roux-en-Y gastric bypass. (b) represents the postoperative scale scores for patients with a postoperative severe complication (Clavien–Dindo grade ≥ 3) and scale scores for patients with a successful postoperative total weight loss (> 20 %TWL) after 1 year. All outcomes are measured with RAND-36. Percentage difference (%) and p-value are comparisons to the Dutch benchmark. SD standard deviation, % percentage
*Statistically significant results and clinically relevant difference measured
**p-value measured with the postoperative uncomplicated and the successful %TWL group