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Table 2 Distribution of frequency of heavy episodic drinking among alcohol related injured patients and controls who reported to have drunk alcohol in the preceding year

From: Associations between heavy episodic drinking and alcohol related injuries: a case control study

HED frequency Among alcohol related injured patients (n = 413) Among controls (n = 1692) Test statistics
None 16.5 (68) 42.7 (722) Chi-square = 432.2, df = 5, p < .001
1-2 times per year 13.1 (54) 19.2 (325)
3-11 times per year 15.7 (65) 26.2 (444)
Once a month 13.1 (54) 5.3 (90)
Several times a month 15.7 (65) 3.8 (64)
Several times a week 25.9 (107) 2.8 (47)
  1. Percent (Number of observations in parentheses).