Table 2.

Mean OHI-S, GI, PPD, and CAL of the study subjects

Variable	Groups	n	Mean	Mean difference	t	P
OHIS	RA	100	2.376±0.95	0.004	0.029	0.977 (NS)
	OA	100	2.372±0.98
GI	RA	100	1.537±0.50	–0.138	–1.904	0.058 (NS)
	OA	100	1.675±0.52
PPD	RA	100	3.682±1.77	–0.065	–0.269	0.788 (NS)
	OA	100	3.747±1.64
CAL	RA	100	4.301±2.08	0.684	2.434	0.016*
	OA	100	3.617±1.89

NS=nonsignificant Independent t test; * indicates significant at P≤0.05; PPD and CAL are expressed in mm