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Table 4 Plaque index change recorded at the first orthodontic checkup 1 month after professional cleaning and instruction in the telephone call and text message groups

From: Oral hygiene compliance in orthodontic patients: a randomized controlled study on the effects of a post-treatment communication

  Group phone call (n = 26) Group text message (n = 28) Comparison (P)a
Plaque index
 Median,(Iqr) 0.23 (0.60) 0.34 (0.65) 0.598
  1. Iqr interquartile range
  2. aTwo-sample Wilcoxon rank-sum (Mann–Whitney) test