Table 2.
Exposure and outcome definitions
| Authors | Yr | Exposure (source) | BMI reference (kg/m2) |
Exposure (definitions) |
Outcome (source) | Outcome (definitions) | ||
| BMI overweight(kg/m2) | BMI obese(kg/m2) | BMI overweight + obese (kg/m2) | ||||||
| Ha et al[43] | 2010 | Measured BMI | ≤ 25 | ≥ 25 | Endoscopy | Los Angeles classification | ||
| Nam et al[44] | 2010 | Measured BMI | < 20 | 25-29.9 | ≥ 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Wang et al[46] | 2010 | Measured BMI | < 25 | 25-30 | > 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Koo et al[45] | 2009 | Measured BMI | < 23 | 23-24.9 | ≥ 25 | ≥ 23 | Endoscopy | Los Angeles classification |
| Koo et al[45] | 2009 | Measured BMI | < 23 | 23-24.9 | ≥ 25 | ≥ 23 | Endoscopy | Los Angeles classification |
| Chua et al[47] | 2009 | Self-report | < 25 | ≥ 25 | ≥ 25 | Endoscopy | Los Angeles classification | |
| Song et al[48] | 2009 | Measured BMI | ≥ 30 | Endoscopy | Los Angeles classification | |||
| Lien et al[49] | 2009 | Self-report | < 24 | 24-26.9 | ≥ 27 | ≥ 24 | Endoscopy | Modified Savary-Miller endoscopic classification |
| Lien et al[49] | 2009 | Self-report | < 24 | 24-26.9 | ≥ 27 | ≥ 24 | Endoscopy | Modified Savary-Miller endoscopic classification |
| Nam et al[50] | 2009 | Self-report | < 20 | 25-29.9 | ≥ 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Lee et al[51] | 2009 | Measured BMI | 20-25 | 25-30 | ≥ 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Chung et al[52] | 2008 | Measured BMI | < 23 | 23-24.9 | ≥ 25 | ≥ 23 | Endoscopy | Los Angeles classification |
| Zagari et al[53] | 2008 | Self-report | 20-24.9 | 25-29.9 | ≥ 30 | ≥ 25 | Endoscopy | Modified Savary-Miller endoscopic classification |
| Lee et al[54] | 2008 | Measured BMI | < 20 | 25-30 | > 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Kim et al[42] | 2008 | Measured BMI | < 23 | ≥ 25 | Endoscopy | Los Angeles classification | ||
| Moki et al[56] | 2007 | Measured BMI | < 25 | ≥ 25 | Endoscopy | Los Angeles classification | ||
| Kim et al[58] | 2007 | Measured BMI | 18.9-24.5 | 25-29.9 | ≥ 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Nocon et al[55] | 2007 | Measured BMI | 25-30 | > 30 | Endoscopy | Los Angeles classification | ||
| Kang et al[57] | 2006 | Measured BMI | < 25 | 25-30 | > 30 | ≥ 25 | Endoscopy | Los Angeles classification |
| Labenz et al[8] | 2004 | Measured BMI | < 25 | 25-30 | > 30 | Endoscopy | Los Angeles classification | |
| Nilsson et al[12] | 2002 | Self-report | < 25 | 25-30 | > 30 | ≥ 25 | Endoscopy | Modified Savary-Miller endoscopic classification |
| Wilson et al[59] | 1999 | Measured BMI | < 20 | 25-30 | > 30 | ≥ 25 | Endoscopy | NA |
| Stene-Larsen et al[4] | 1988 | Measured BMI | < 25 | 25-28 | > 28 | Endoscopy | NA | |
BMI: Body mass index; NA: Not available.