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Table 3 Comparison between Streptococcus-colonies count at baseline, one, and 3-month follow-ups

From: The effect of brushing with Salvadora persica (miswak) sticks on salivary Streptococcus mutans and plaque levels in children: a clinical trial

Period Test group n (%)Control group n (%)P value
OR (95% CI)
Streptococcus colonies
Prior to preparatory period (baseline) Test (N = 47)
Control (N = 47)
S. mutans32 (86.5)33 (76.7)a
S. sanguinis05 (11.6)
Others5 (13.5)5 (11.6)P = 0.96 0.97 (0.25–3.67)
1-month follow-up
Test (N = 34)
Control (N = 39)
S. mutans27 (73)36 (83.7)P = 0.3 0.45 (0.09–2.05)
S. sanguinis5 (13.5)3 (7)
Others5 (13.5)4 (9.3)P = 0.476 0.6 (0.15–2.45)
3-month follow-up***
Test (N = 34)
Control (N = 39)
S. mutans28 (82.4)35 (89.7) 
S. sanguinis6 (17.6)4 (10.3)P = 0.36 0.53 (0.14–2.07)
Others00a
  1. a: not applicable because one of the input cells contains a value of 0
  2. *** the total number (73) less than 80 because of children who were either absent or took antibiotics