Table 1.
Cohort Characteristics and Availability of Data
| Characteristics | Cohort (n = 571) |
|---|---|
| Age (years): mean (SD) | 44.8 (10.8) |
| Sex (Female): % (n) | 79.2 (452) |
| Race | |
| African American: % (n) | 17.9 (102) |
| Hispanic: % (n) | 1.8 (10) |
| Caucasian: % (n) | 80.4 (459) |
| Baseline (Intake evaluation) BMI kg/m2: mean (SD) | 49.5 (9.3) |
| Baseline (Intake evaluation) Excess body weight (kg): mean (SD) | 79.9 (26.4) |
| Surgery type | |
| LSG: % (n) | 56.4 (322) |
| LRYGB: % (n) | 43.6 (249) |
| % Excess body weight lost | |
| 6 months: mean (SD) | 44.9 (17.1) |
| 12 months: mean (SD) | 53.7 (18.1) |
| 24 months mean (SD) | 52.3 (21.2) |
| % Total weight loss | |
| 6 months: mean (SD) | 24.6 (6.8) |
| 12 months: mean (SD) | 29.9 (9.7) |
| 24 months mean (SD) | 29.4 (12.0) |
| Plasma retinol availability | |
| Baseline: % (n) | 55.7 (318) |
| 6 months: % (n) | 74.2 (423) |
| 12 months: % (n) | 60.8 (347) |
| 24 months: % (n) | 36.7 (209) |
BMI, body mass index; LRYGB, laparoscopic Roux-en-Y gastric bypass; LSG, laparoscopic sleeve gastrectomy; SD, standard deviation.