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Table 1 Characteristics of study groups

From: Dietary guideline adherence for gastroesophageal reflux disease

  GERD Group (physician-assigned) Population controls without GERD1
  Number or Mean (% or standard deviation) Number or Mean (% or standard deviation)
Number of subjects 308 182
Age (years)   
 20-39 11 (4) 9 (5)
 40-59 111 (36) 63 (35)
 60-79 186 (60) 110 (60)
Race/Ethnicity   
 White 247 (80) 154 (84)
 Black 20 (6) 10 (5)
 Hispanic 20 (6) 7 (4)
 Asian 8 (3) 5 (3)
 Others/Missing/Unknown 13 (4) 6 (3)
 Male 211 (69) 123 (68)
GERD symptoms   
Severity2   
 Severe & very severe 124 (40) --
 Moderate 109 (35) --
 Mild 75 (25) --
Frequency   
 Daily 78 (25) --
 Several times a week 89 (29) --
 Once month – once a week 91 (30) --
 Less than once a month 50 (16) --
 BMI 28.9 (5.2) 28.3 (5.5)
Smoking   
 Current smoker 30 (10) 19 (10)
 Portion size   
 % extra large or large 27.9 (16.3) 28.8 (17.2)
  1. 1Self-reported heartburn or acid reflux <1/month.
  2. 2Severity with at least monthly or less than once a month frequency.