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Table 2 Correlation between EE as an ordinal variable and dichotomous study variables

From: Prevalence of esophageal eosinophilia in patients referred for diagnostic upper gastrointestinal endoscopy

Study variable Correlation coefficient P value
Rank biserial correlation (dichotomous variables) rrb
Marital status 0.025 0.817
Sex − 0.246 0.022
Residence 0.185 0.088
Diabetes mellitus 0.086 0.431
Hypertension 0.217 0.045
Atopy 0.125 0.252
NSAIDs use 0.125 0.252
PPI use − 0.066 0.548
Dysphagia 0.336 0.002
Nausea − 0.056 0.607
Vomiting 0.026 0.812
Heartburn 0.101 0.355
Abdominal pain 0.042 0.699
Chronic gastritis − 0.186 0.086
H. pylori − 0.011 0.923
Hiatus hernia 0.485 < 0.001
Incompetent cardia − 0.348 0.001
Fixed rings 0.452 < 0.001
Weight loss − 0.084 0.429