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Table 2 Intergroup baseline comparability (t and Chi-square tests)

From: Dentoskeletal and soft tissue changes in class II subdivision treatment with asymmetric extraction protocols

  Group 1—3 extractions (n = 31) Group 2—1 extraction (n = 32)  
Variables Mean S.D. Mean S.D. P
Initial age 13.58 2.26 13.98 1.66 0.425a
Final age 16.83 2.39 16.90 1.85 0.888a
Treatment time 3.25 1.02 2.92 1.02 0.210a
Sex
 Male 13   12   
 Female 18   20   0.719b
Maxillary Little Irregularity Index 5.33 4.02 4.22 2.74 0.202a
Mandibular Little Irregularity Index 2.52 1.52 2.43 1.74 0.824a
  1. a t test
  2. bChi-square test