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Table 1 Demographic comparisons by group

From: Evaluation of strategies for increasing response rates to postal questionnaires in quality control of nasal septal surgery

Demographic characteristic Total N = 160 Group A (standard) N = 80 Group B (modified) N = 80 p value
Age, mean ± SD 35.3 ± 12.0 34.1 ± 11.3 36.5 ± 12.7 0.21*
Gender, n (%) 0.18**
 Females 53 (33.1) 31 (38.8) 22 (27.5)  
 Males 107 (66.9) 49 (61.2) 58 (72.5)  
  1. * Independent sample t test
  2. ** Chi square test