Table 3.

Comparison of mean percentage reduction of values of the parameters from pretreatment to posttreatment studied between different age groups in generalized chronic periodontitis group

Mean percentage reduction from pretreatment to posttreatment	Age (years)	n	Mean±SD	F-value	P
PI	≤40	11	65.10±7.75	1.068	0.356 (NS)
	41-50	11	60.69±8.29
	>50	8	63.86±6.17
PBI	≤40	11	57.34±13.91	0.325	0.725 (NS)
	41-50	11	56.02±11.10
	>50	8	60.03±6.95
PD (mm)	≤40	11	52.27±9.72	0.749	0.481 (NS)
	41-50	11	56.98±8.92
	>50	8	52.74±12.33
CAL (mm)	≤40	11	47.44±11.11	0.832	0.445 (NS)
	41-50	11	48.08±8.43
	>50	8	42.77±10.27
ROM plasma (CARR U)	≤40	11	43.10±29.99	1.423	0.257 (NS)
	41-50	11	51.57±20.45
	>50	8	60.40±15.06
ROM saliva (CARR U)	≤40	11	55.78±18.60	0.238	0.790 (NS)
	41-50	11	51.33±18.84
	>50	8	50.50±21.24
ROM GCF (CARR U)	≤40	11	53.69±25.65	0.739	0.486 (NS)
	41-50	11	42.37±18.19
	>50	8	50.68±26.60

NS (P>0.05). NS – Not significant; n – Number of patients; F value – Measures variance; P – Probability value; SD – Standard deviation; PI – Plaque index; PBI – Papillary bleeding index; PD – Probing depth; CAL – Clinical attachment level; ROM – Reactive oxygen metabolite; GCF – Gingival crevicular fluid; CARR U – Carratelli units