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Table 1 Comparability of groups regarding sex distribution (chi-square test)

From: Stability of class II subdivision malocclusion treatment with 3 and 4 premolar extractions

Group Sex Total (n)
Male (n) Female (n) (N)
Group 1 (3 premolar extractions) 9 15 24
Group 2 (4 premolar extractions) 20 8 28
Total 29 23 52
  1. Chi-square = 0.47.
  2. df = 1.
  3. p = 0.49.