Table 1.

Demographic and clinical indices after matching.

Feature		Control	GERD no PPI		GERD + PPI		Control + PPI
Sex1	Female	54	14		13		4
	Male	38	2	p < 0.028	7	p < 0.629	6	p < 0.346
Age2	Mean	57.8 ± 1.66	54.4 ± 4.0	p < 0.367	63.5 ± 2.2	p < 0.120	67.4 ± 3.5	p < 0.047
Tobacco User1	User	31	7		7		2
	Nonuser	61	9	p < 0.571	13	p < 0.419	8	p < 1
Dentate1	No	21	4		6		8
	Yes	71	12	p < 1.0	14	p < 1	2	p < 0.0009
Periodontal Disease1	No	80	14		13		8
	Yes	12	2	p < 1.0	7	p < 0.127	2	p < 0.500

¹Fisher Exact Test versus control.

²Student t Test versus control.

³Periodontal disease is Class III and IV by ADP/AAP.