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. 2020 Oct 24;78(2):157–163. doi: 10.1016/j.mjafi.2020.08.002

Table 3.

Paired T-test (group A).

Groups Periodontal parameters N Mean Std. deviation Std. error mean Mean difference t-value p-value
Pair 1 PI-0 30 2.47 0.51 0.09 1.37 12.17 <0.001
PI-1 30 1.10 0.48 0.09
Pair 2 PI-1 30 1.10 0.48 0.09 0.23 2.04 0.05
PI-2 30 0.87 0.43 0.08
Pair 3 PI-0 30 2.47 0.51 0.09 1.60 15.56 <0.001
PI-2 30 0.87 0.43 0.08
Pair 4 GBI-0 30 2.43 0.50 0.09 1.60 12.11 <0.001
GBI-1 30 0.83 0.46 0.08
Pair 5 GBI-1 30 0.83 0.46 0.08 0.53 5.76 <0.001
GBI-2 30 0.30 0.47 0.09
Pair 6 GBI-0 30 2.43 0.50 0.09 2.13 16.00 <0.001
GBI-2 30 0.30 0.47 0.09
Pair 7 PD-0 30 5.67 0.84 0.15 2.37 16.95 <0.001
PD-1 30 3.30 0.84 0.15
Pair 8 PD-1 30 3.30 0.84 0.15 1.13 8.00 <0.001
PD-2 30 2.17 0.38 0.07
Pair 9 PD-0 30 5.67 0.84 0.15 3.50 28.10 <0.001
PD-2 30 2.17 0.38 0.07
Pair 10 CAL-0 30 3.63 0.85 0.16 2.30 16.80 <0.001
CAL-1 30 1.33 0.80 0.15
Pair 11 CAL-1 30 1.33 0.80 0.15 1.10 8.46 <0.001
CAL-2 30 0.23 0.43 0.08
Pair 12 CAL-0 30 3.63 0.85 0.16 3.40 25.72 <0.001
CAL-2 30 0.23 0.43 0.08

There is significant change in all the four variables viz. PI, GBI, PD and CAL at all the time points with p-value less than 0.01. Bold signifies P< 0.05.

PI, plaque index; GBI: Gingival bleeding index; PD, pocket depth; CAL, clinical attachment level.