Table 1.

Details of the included periodontitis-related GEO datasets.

Included four datasets	Type of periodontitis	Experimental platform	Number of examined genes	Number of inflamed gingival tissue samples	Number of healthy control samples	Number of total samples
GSE23586	3 patients with severe chronic periodontitis	GPL570	23,518	3	3	6
GSE16134	120 patients (65 with chronic periodontitis and 55 with aggressive periodontitis)	GPL570	24,441	241	69	310
GSE10334	63 with chronic periodontitis and 27 with aggressive periodontitis	GPL570	24,441	183	64	247
GSE79705	Generalized aggressive periodontitis (GAgP): n = 4; chronic periodontitis (CP): n = 4	GPL18734	19,305	8	4	12