. 2020 Sep 1;24(5):414–420. doi: 10.4103/jisp.jisp_23_20

Table 3.

Descriptive statistics of plaque index, gingival index, and probing depth measurements according to the Angle’s classification and amount of crowding

Parameters	Mean±SD				P*

	Mild crowding	Moderate crowding	Severe crowding	Total
PI

Maxillary
Class I	0.57±0.09	0.54±0.13	0.65±0.14	0.58±0.13	0.074
Class II	0.53±0.09	0.58±0.12	0.60±0.11	0.57±0.11	0.372
Total	0.55±0.09	0.55±0.13	0.63±0.13	0.58±0.12	0.059
P	0.304	0.404	0.419	0.611
Mandibular
Class I	0.68±0.20	0.67±0.09	1.12±0.17	0.82±0.26	<0.0001
Class II	0.94±0.34	1.10±0.23	0.92±0.19	1.01±0.25	0.306
Total	0.78±0.28	0.85±0.27	1.05±0.20	0.89±0.27	0.011
P^Å¦	0.106	<0.0001	0.040	0.012

GI

Maxillary
Class I	1.16±0.20	1.08±0.25	1.06±0.19	1.10±0.21	0.485
Class II	1.19±0.19	1.23±0.29	1.00±0.32	1.15±0.28	0.176
Total	1.18±0.19	1.14±0.27	1.04±0.24	1.12±0.24	0.147
P	0.756	0.192	0.603	0.424
Mandibular
Class I	0.75±0.27	1.03±0.26	0.51±0.10	0.79±0.31	<0.0001
Class II	0.66±0.05	0.56±0.13	0.52±0.12	0.57±0.12	0.145
Total	0.72±0.22	0.83±0.32	0.51±0.11	0.70±0.27	0.001
P^Å¦	0.488	<0.0001	0.893	0.004

PPD

Maxillary
Class I	1.37±0.25	1.46±0.37	1.57±0.15	1.47±0.28	0.239
Class II	1.40±0.19	1.34±0.13	1.39±0.18	1.38±0.17	0.709
Total	1.39±0.22	1.41±0.30	1.50±0.19	1.43±0.24	0.302
P	0.784	0.325	0.022	0.102
Mandibular
Class I	1.55±0.39	1.48±0.24	1.25±0.13	1.42±0.28	0.031
Class II	1.38±0.13	1.44±0.28	1.33±0.10	1.40±0.21	0.618
Total	1.48±0.32	1.46±0.25	1.28±0.13	1.40±0.25	0.028
P^Å¦	0.372	0.720	0.174	0.748

P<0.05 statistically significant. *Obtained using analysis of variance; ^Å¦Obtained using independent t-test; Bold values: Significant. SD – Standard deviation; PI – Plaque index; GI – Gingival index; PPD – Probing pocket depth; P – Probability of occurrence