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Table 3 Baseline sample characteristics

From: Three-dimensional oropharyngeal airway changes after facemask therapy using low-dose computed tomography: a clinical trial with a retrospectively collected control group

Variable Control group (N = 16) Facemask group (N = 18) Mean difference P-value 95% Confidence interval of the difference
Mean SD Mean SD lower Upper
Gender(female) 9 (56.25%) 9 (50. %) 0.716
Age (year) 7.03 0.56 7.81 0.84 −0.77 0.006** −1.27 −0.28
Observation/treatment period (month)§ 12.25 1.00 11.17 2.18 1.08 0.069 −0.09 2.26
  1. SD standard deviation
  2. Pearson's Chi-square test
  3. Mann–Whitney U test
  4. §Two-sample t-test
  5. **p < 0.01