Table 2.
Baselinea characteristics of adult patients aged 20-79 years in the PCORnet Bariatric Study cohort (N=65,093).
| Characteristic | AGBb | RYGBc | SGd | All | |
| Number, (%) | 3192 (100.00) | 32,208 (100.00) | 29,693 (100.00) | 65,093 (100.00) | |
| Age at surgery, mean (SD) | 45.7 (12.35) | 45.5 (11.63) | 44.3 (11.72) | 45.0 (11.72) | |
| Age category, n (%) | |||||
| 20-44 years | 1509 (47.27) | 15,146 (47.03) | 15,481 (52.14) | 32,136 (49.37) | |
| 45-64 years | 1460 (45.74) | 15,357 (47.68) | 12,805 (43.12) | 29,622 (45.51) | |
| 65-79 years | 223 (6.99) | 1705 (5.29) | 1407 (4.74) | 3335 (5.12) | |
| Female, n (%) | 2524 (79.07) | 25,679 (79.73) | 23,416 (78.86) | 51,619 (79.30) | |
| Baseline maximum BMI, mean (SD) | 46.1 (6.80) | 49.5 (8.23) | 48.8 (8.29) | 49.0 (8.23) | |
| Baseline maximum BMI category, n (%) | |||||
| 35-39 kg/m2 | 547 (17.14) | 2566 (7.97) | 2715 (9.14) | 5828 (8.95) | |
| 40-49 kg/m2 | 1897 (59.43) | 16,740 (51.97) | 16,373 (55.14) | 35,010 (53.78) | |
| 50-59 kg/m2 | 623 (19.52) | 9435 (29.29) | 7641 (25.73) | 17,699 (27.19) | |
| ≥60 kg/m2 | 125 (3.92) | 3467 (10.76) | 2964 (9.98) | 6556 (10.07) | |
| Year of surgery, n (%) | |||||
| 2005-2009 | 572 (17.92) | 4519 (14.03) | 481 (1.62) | 5572 (8.56) | |
| 2010 | 719 (22.53) | 4407 (13.68) | 1368 (4.61) | 6494 (9.98) | |
| 2011 | 785 (24.59) | 5735 (17.81) | 3772 (12.70) | 10,292 (15.81) | |
| 2012 | 591 (18.52) | 5364 (16.65) | 4930 (16.60) | 10,885 (16.72) | |
| 2013 | 300 (9.40) | 4703 (14.60) | 6118 (20.60) | 11,121 (17.08) | |
| 2014 | 175 (5.48) | 4414 (13.70) | 7394 (24.90) | 11,983 (18.41) | |
| 2015 | 50 (1.57) | 3066 (9.52) | 5630 (18.96) | 8746 (13.44) | |
| Hispanicf, n (%) | 352 (11.53) | 5598 (17.76) | 7144 (24.58) | 13,094 (20.58) | |
| Race categoryf, n (%) | |||||
| American Indian or Alaska Native | 13 (0.45) | 186 (0.64) | 155 (0.61) | 354 (0.62) | |
| Asian | 15 (0.52) | 225 (0.78) | 300 (1.18) | 540 (0.94) | |
| Black or African American | 685 (23.65) | 4515 (15.65) | 6894 (27.05) | 12,094 (21.13) | |
| Native Hawaiian or Other Pacific Islander | 2 (0.07) | 98 (0.34) | 88 (0.35) | 188 (0.33) | |
| White | 2031 (70.11) | 22,628 (78.45) | 16,589 (65.09) | 41,248 (72.08) | |
| Multiple race | 43 (1.48) | 438 (1.52) | 321 (1.26) | 802 (1.40) | |
| Other | 108 (3.73) | 755 (2.62) | 1138 (4.47) | 2001 (3.50) | |
| Missing race, n (%) | 295 (9.24) | 3363 (10.44) | 4208 (14.17) | 7866 (12.08) | |
| Systolic BPg, mean (SD) | 128.1 (16.46) | 131.0 (18.54) | 131.6 (17.26) | 131.1 (17.89) | |
| Diastolic BP, mean (SD) | 76.7 (11.24) | 76.0 (12.43) | 75.4 (11.75) | 75.8 (12.08) | |
| Missing BP, n (%) | 240 (7.52) | 1930 (5.99) | 1836 (6.18) | 4006 (6.15) | |
| Combined comorbidity scoreh, n (%) | |||||
| <0 | 1022 (32.02) | 10,310 (32.01) | 8911 (30.01) | 20,243 (31.10) | |
| 0 | 1805 (56.55) | 16,672 (51.76) | 16,675 (56.16) | 35,152 (54.00) | |
| >0 | 365 (11.43) | 5226 (16.23) | 4107 (13.83) | 9698 (14.90) | |
| No. of hospital days in year before surgery, mean (SD) | 0.30 (2.22) | 0.46 (4.61) | 0.47 (4.28) | 0.46 (4.37) | |
| Health conditionsi, n (%) | |||||
| Anxiety | 557 (17.45) | 7105 (22.06) | 5995 (20.19) | 13,657 (20.98) | |
| Depression | 799 (25.03) | 10,451 (32.45) | 8074 (27.19) | 19,324 (29.69) | |
| Diabetes | 942 (29.51) | 13,845 (42.99) | 8624 (29.04) | 23,411 (35.97) | |
| DVTj | 20 (0.63) | 220 (0.68) | 214 (0.72) | 454 (0.70) | |
| Dyslipidemia | 1373 (43.01) | 16,251 (50.46) | 12,753 (42.95) | 30,377 (46.67) | |
| Eating disorder | 158 (4.95) | 4441 (13.79) | 1722 (5.80) | 6321 (9.71) | |
| GERDk | 1171 (36.69) | 14726 (45.72) | 10,753 (36.21) | 26,650 (40.94) | |
| Hypertension | 1820 (57.02) | 20,210 (62.75) | 16,267 (54.78) | 38,297 (58.83) | |
| Infertility | 20 (0.63) | 215 (0.67) | 213 (0.72) | 448 (0.69) | |
| Kidney disease | 169 (5.29) | 2764 (8.58) | 1964 (6.62) | 4897 (7.52) | |
| NAFLDl | 429 (13.44) | 8148 (25.30) | 4716 (15.88) | 13,293 (20.42) | |
| Osteoarthritis | 58 (1.82) | 585 (1.82) | 577 (1.94) | 1220 (1.87) | |
| PCOSm | 141 (4.42) | 1741 (5.41) | 1463 (4.93) | 3345 (5.14) | |
| PEn | 29 (0.91) | 402 (1.25) | 286 (0.96) | 717 (1.10) | |
| Psychotic disorder | 70 (2.19) | 1098 (3.41) | 822 (2.77) | 1990 (3.06) | |
| Sleep apnea | 1362 (42.67) | 17,583 (54.59) | 12,840 (43.24) | 31,785 (48.83) | |
| Smoking | 185 (5.80) | 2987 (9.27) | 2380 (8.02) | 5552 (8.53) | |
| Substance use disorder | 31 (0.97) | 673 (2.09) | 615 (2.07) | 1319 (2.03) | |
aBaseline: identified in the year prior to surgery.
bAGB: adjustable gastric banding.
cRYGB: Roux-en-Y gastric bypass.
dSG: sleeve gastrectomy.
eBMI: body mass index.
fNumber and proportion are calculated among patients with non-missing race (or ethnicity) information.
gBP: blood pressure.
hThe combined comorbidity score merges the Charlson and Elixhauser comorbidity scores [9]. It is calculated based on 20 conditions identified by ICD-9-CM and SNOMED codes in the year prior to surgery. The score ranges from –2 to 26, with a higher score generally indicating poorer health status.
iIdentified by one or more ICD-9-CM or SNOMED diagnosis code in the year prior to surgery.
jDVT: deep vein thrombosis.
kGERD: gastroesophageal reflux disease.
lNAFLD: non-alcoholic fatty liver disease.
mPCOS: polycystic ovarian syndrome.
nPE: pulmonary embolism.