Table 1.
Demographics and comorbidities among bariatric surgery patients stratified by surgery type (N = 2,420)
| Variables | Gastric banding n (%) |
Gastric bypass n (%) |
P-value |
|---|---|---|---|
| Overall | 380 (16) | 2040 (84) | – |
| Age (years) | |||
| Q1 (< 40) | 93 (24) | 586 (29) | < 0.0001 |
| Q2 (40–47) | 77 (20) | 498 (24) | |
| Q3 (47–53) | 78 (21) | 518 (25) | |
| Q4 (> 53) | 132 (35) | 438 (21) | |
| Mean ± SD | 45 ± 11 | 43 ± 9.8 | < 0.0001 |
| Median (IQR) | 45 (18) | 43 (15) | |
| Gender | |||
| Male | 78 (21) | 371 (18) | 0.29 |
| Female | 302 (79) | 1667 (82) | |
| Weight (lbs) | |||
| Q1 (< 274) | 161 (42) | 458 (22) | < 0.0001 |
| Q2 (272–312) | 113 (30) | 492 (24) | |
| Q3 (312–363) | 83 (22) | 519 (25) | |
| Q4 (> 363) | 23 (6) | 571 (28) | |
| Mean ± SD | 278 ± 47 | 321 ± 72 | < 0.0001 |
| Median (IQR) | 272 (58) | 308 (90) | |
| Body mass index | |||
| Q1 (< 44) | 209 (55) | 495 (24) | < 0.0001 |
| Q2 (44–50) | 103 (27) | 483 (24) | |
| Q3 (50–57) | 50 (13) | 530 (26) | |
| Q4 (> 57) | 18 (5) | 532 (26) | |
| Mean ± SD | 45 ± 6.1 | 52 ± 9.7 | < 0.0001 |
| Median (IQR) | 44 (7.0) | 50 (12) | |
| GERD | |||
| No | 264 (69) | 1331 (65) | 0.11 |
| Yes | 116 (31) | 709 (35) | |
| DJD | |||
| No | 205 (54) | 1000 (49) | 0.078 |
| Yes | 175 (46) | 1040 (51) | |
| Diabetes | |||
| No | 240 (63) | 1333 (65) | 0.41 |
| Yes | 140 (37) | 707 (35) | |
| Apnea | |||
| No | 262 (69) | 1369 (67) | 0.48 |
| Yes | 118 (31) | 671 (33) | |
| HTN | |||
| No | 132 (35) | 829 (41) | 0.031 |
| Yes | 248 (65) | 1211 (59) | |
| Dyslipidemia | |||
| No | 238 (63) | 1709 (84) | < 0.0001 |
| Yes | 142 (37) | 331 (16) | |
| Asthma | |||
| No | 328 (86) | 1856 (91) | 0.0049 |
| Yes | 52 (14) | 184 (9) | |
| Heart disease | |||
| No | 365 (96) | 1969 (97) | 0.65 |
| Yes | 15 (4) | 71 (3) | |
| HgbA1c | |||
| Q1 (< 6.3) | 306 (81) | 1794 (88) | < 0.0001 |
| Q2 (6.3–7.4) | 33 (9) | 76 (3.7) | |
| Q3 (7.4–8.9) | 28 (7) | 73 (4) | |
| Q4 (> 8.9) | 13 (3) | 97 (5) | |
| Mean ± SD | 6.2 ± 1.1 | 7.4 ± 10 | 0.011 |
| Median (IQR) | 5.9 (0.90) | 6.2 (2.0) | |
χ2 or Fisher’s exact test was used for categorical variables depending upon the size of data for each respective variable (i.e., if any one cell in a 2 × 2 table was less than 5, Fisher’s Exact test was used). Student’s t-test or Wilcoxon Rank Sum was used for continuous variables depending upon the normalcy of distribution
DJD degenerative joint disease, GERD gastroesophageal reflux disease, HgbA1c hemoglobin A1c, IQR interquartile range, Lbs pounds, Q1 first quartile, Q2 second quartile, Q3 third quartile, Q4 fourth quartile, SD standard deviation