Table 2.

Characteristics of study subjects.

Clinical characteristics	Down syndrome (n = 40)	Control (n = 40)	P-value
Dental examination
DMFT/dmft index
Total	0.65 ± 1.74	0.83 ± 1.14	0.054
Primary	0.08 ± 0.28	0.00 ± 0.00	0.75
Mixed	0.94 ± 2.26	0.84 ± 1.23	0.56
Permanent	0.82 ± 1.59	1.42 ± 1.04	0.047
Dental caries prevalence (%)
Total	20.0	42.5	0.003
Primary	8.3	0	0.37
Mixed	23.5	36.8	0.34
Permanent	27.3	83.3	0.007
PLI
Total	2.13 ± 0.84	1.93 ± 0.69	0.19
Primary	1.75 ± 0.92	1.56 ± 0.50	0.62
Mixed	2.18 ± 0.71	2.11 ± 0.72	0.79
Permanent	2.45 ± 0.78	1.92 ± 0.64	0.08
PD (mm)
Total	2.85 ± 0.73	2.63 ± 0.53	0.17
Primary	2.58 ± 0.50	2.33 ± 0.47	0.34
Mixed	2.94 ± 0.54	2.79 ± 0.52	0.51
Permanent	3.00 ± 1.04	2.58 ± 0.47	0.35
GI
Total	1.78 ± 0.52	1.38 ± 0.66	0.002
Primary	1.58 ± 0.64	1.11 ± 0.57	0.11
Mixed	1.88 ± 0.32	1.63 ± 0.58	0.3
Permanent	1.82 ± 0.57	1.17 ± 0.64	0.01
BOP (%)
Total	82.5	47.5	0.001
Primary	66.7	22.2	0.024
Mixed	88.2	68.4	0.31
Permanent	90.9	33.3	0.007

DMFT/dmft index Decayed, Missing, and Filled Teeth/decayed, missing, and filled teeth index, PLI Plaque Index, PD Probing Depth, GI Gingival Index, BOP Bleeding on Probing.

Values in DMFT/dmft index, PLI, PD, GI indicate mean ± SD.

The Chi-squared test (Fisher’s exact probability test for dentition comparisons) was used to compare the prevalence of caries and BOP. The Mann–Whitney U test was used to analyze the DMFT/dmft index, PLI, PD, and GI. Bold type in P-value indicates a significant difference (P < 0.05).