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. Author manuscript; available in PMC: 2013 Jun 14.
Published in final edited form as: JAMA. 2012 Jun 20;307(23):2516–2525. doi: 10.1001/jama.2012.6147

Table 1.

Preoperative Characteristics of LABS-2 Participants Included in Analysis

No. (%)
N=1945a
Sociodemographics
Male 413 (21.2)
Age, years
 median (quartiles) 47 (38,55)
 range 19–78
Race
 White 1681 (87.0)
 Black 182 (9.4)
 Asian 3 (0.2)
 American Indian/Alaska Native 13 (0.7)
 Native Hawaiian/other Pacific Islander 4 (0.2)
 Multiple races 37 (1.9)
 Unknown 12 (0.6)
Hispanic ethnicity 89 (4.6)
Married/living as married 1239 (64.0)
Education
 High school or less 445 (23.0)
 Some college 768 (39.7)
 College degree or higher 722 (37.3)
Work for pay 1322 (68.2)
Household income
 less than $25,000 340 (18.0)
 $25,000–$49,000 483 (25.6)
 $50,000–$74,999 434 (23.0)
 $75,000–$99,999 307 (16.3)
 $100,000 or more 321 (17.0)
Anthropometrics
Body Mass Index, kg/m2
 median (quartiles) 45.8 (41.8,51.3)
 range 33.7–94.3
Quality of Life and Mental Health
SF-36 Physical component score
  median (quartiles) 36.3 (27.8,44.9)
  range 8.7–70.3
SF-36 Mental component score
  median (quartiles) 51.5 (42.8,57.1)
  range 12.6–75.9
Beck Depression Inventory score
  median (quartiles) 7 (3,12)
  range 0–39
Binge eating 308 (16.1)
Past-year treatment for psychiatric or emotional problems 1106 (57.4)
Interpersonal support
 ISEL Appraisal score
  median (quartiles) 16 (13,16)
  range 4–16
 ISEL Belonging score
  median (quartiles) 16 (12,16)
  range 4–16
 ISEL Tangible score
  median (quartiles) 15(13,16)
  range 4–16
Smoking, Alcohol and Drug Use
Current smokers 43 (2.2)
Regular alcohol consumption (≥2 times/week) 137 (7.0)
Alcohol Use Disorderb 152 (7.8)
Past-year recreational drug use 83 (4.3)
Surgical Procedure
 Roux-en-Y gastric bypass 1360 (69.9)
 Laparoscopic adjustable gastric band 490 (25.2)
 Banded gastric bypassc 30 (1.5)
 Sleeve gastrectomy 50 (2.6)
 Biliopancreatic diversion with switch 15 (0.8)

Abbreviations: SF-36, Medical Outcomes Study 36-item Short-Form Health Survey; ISEL, Interpersonal Support Evaluation List; AUDIT, Alcohol Use Disorders Identification Test.

a

The number of participants across categories may not sum to the total number of participants because of missing data.

b

AUDIT score ≥8, alcohol dependence symptoms, or alcohol-related harm.

c

Roux-en-Y gastric bypass with a non-adjustable band during the same operation.