Table 1 Statistical comparison of groups for mast cell counts
From: Biocompatibility of nanosilver-coated orthodontic brackets: an in vivo study
Days | Groups | Mast cell counts | Mann–Whitney U test | 95 % confidence interval for mean | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
n | Mean ± SD | Med. | Min./max. | Mean rank | U | p | Lower bound | Upper bound | ||
7 | Study | 6 | 6.50 ± 4.09 | 6.50 | 1.0/11.0 | 3.83 | 2.00 | 0.009* | 2.2 | 10.8 |
Control | 6 | 23.83 ± 12.24 | 21.00 | 8.0/45.0 | 9.17 | 11.0 | 36.8 | |||
Sum | 12 | 15.17 ± 12.55 | 11.00 | 1.0/45.0 | 12.8 | 33.6 | ||||
14 | Study | 6 | 23.17 ± 9.91 | 20.00 | 14.0/37.0 | 7.92 | 9.50 | 0.180 | 8.1 | 22.2 |
Control | 6 | 15.17 ± 6.74 | 14.50 | 8.0/27.0 | 5.08 | 17.876 | 31.457 | |||
Sum | 12 | 19.17 ± 9.09 | 16.00 | 8.0/37.0 | 13.9 | 31.4 | ||||
30 | Study | 6 | 24.67 ± 6.47 | 25.50 | 17.0/31.0 | 7.08 | 14.50 | 0.589 | 13.887 | 20.113 |
Control | 6 | 22.67 ± 8.36 | 21.50 | 13.0/37.0 | 5.92 | 7.3 | 25.3 | |||
Sum | 12 | 23.67 ± 7.20 | 22.50 | 13.0/37.0 | 2.2 | 10.8 | ||||
60 | Study | 6 | 17.00 ± 2.97 | 17.50 | 13.0/20.0 | 7.75 | 10.50 | 0.240 | 11.0 | 36.8 |
Control | 6 | 16.33 ± 8.57 | 13.50 | 10.0/33.0 | 5.25 | 12.8 | 33.6 | |||
Sum | 12 | 16.67 ± 6.12 | 16.00 | 10.0/33.0 | 8.1 | 22.2 | ||||