Table 1.
Pre-surgery characteristics of study participants
| N | Mean ± SD | Males | Females | |
|---|---|---|---|---|
|
| ||||
| Demographic characteristics | 100 | 17% | 83% | |
| Race | ||||
| Caucasian | 68 | 12 (70%) | 56 (67.5%) | |
| African American | 16 | 1 (5.9%) | 15 (18.1%) | |
| Hispanics | 15 | 4 (23.5%) | 11 (13.3%) | |
| Asian | 1 | - | 1 (1.2%) | |
| Surgery type | ||||
| RYGB | 72 | 14 (82.4%) | 58 (69.9%) | |
| LB | 11 | 1 (5.9%) | 10 (12%) | |
| BPD/DS | 4 | - | 4 (4.8%) | |
| SG | 13 | 2 (11.8%) | 11 (13.3%) | |
| Age (y) | 100 | 44.2 ± 11.6 | 45.5 ± 14.2 | 43.9 ± 11.0 |
| Height (cm) | 100 | 167.6 ± 8.3 | 178.2 ± 6.0 | 165.4 ± 7.0 |
| Weight (kg) | 100 | 128.6 ± 22.5 | 144.6 ± 21.5 | 125.4 ± 21.4 |
| Fit in MRI | 29 | 115.8 ± 13.2 | 130.0 ± 1.4 | 114.1 ± 13.0 |
| Did not fit in MRI | 71 | 133.9 ± 23.4 | 147.7 ± 22.5 | 130.5 ± 22.5 |
| BMI (kg/m2) | 100 | 45.7 ± 6.7 | 45.4 ± 5.8 | 45.8 ± 6.8 |
| Fit in MRI | 29 | 42.1±4.4 | 41.2 ± 0.8 | 42.2 ± 4.7 |
| Did not fit in MRI | 71 | 47.2±6.9 | 46.4 ± 6.0 | 47.4 ± 7.1 |
| % Fat (3C) †† | 97 | 52.5 ± 6.1 | 46.8 ± 8.5 | 53.7 ± 4.7 |
| Body composition† | ||||
| TAT (kg) | 29 | 59.5 ± 8.0 | 55.5 ± 5.5 | 59.9 ± 8.2 |
| SAT (kg) | 29 | 52.8 ± 7.7 | 46.3 ± 6.1 | 53.5 ± 7.6 |
| VAT (kg) | 29 | 4.7 ± 1.8 | 7.2 ± 2.5 | 4.5 ± 1.8 |
| IMAT (kg) | 29 | 2.0 ± 0.6 | 2.3 ± 0.3 | 2.0 ± 0.6 |
RYGB Roux-en-Y gastric bypass, LB laparoscopic adjustable gastric band, BPD biliopancreatic diversion, DS duodenal switch, SG sleeve gastrectomy
%FAT (3C) = 2.122*(bodpod weight/density)−0.779*0.9937*TBW−1.356*bodpod weight
††
97 subjects completed the densitometry measurement for the 3C model
†
29 subjects had whole body MRIbefore surgery
TAT total adipose tissue, SAT subcutaneous adipose tissue, VAT visceral adipose tissue, IMAT intermuscular adipose tissue