Table 1. Demographic features of study subjects (N = 16,609).

Characteristics		%	n
Gender
	Female	54.01	8,971
	Male	45.99	7,638
Age, year
	16–25	49.62	8,241
	26–35	32.99	5,479
	36–45	10.31	1,712
	46–55	7.09	1,177
Complexity of odontectomy
	Non-complicated	32.63	5,419
	Complicated	60.29	11,190
History of abscess or cellulitis
No		98.59	16,374
Yes		1.41	235
History of gingivitis or pericoronitis
	No	24.84	4,126
	Yes	75.16	12,483
State of oral hygiene maintenance
	Good	25.19	4,183
	Fair	52.95	8,794
	Poor	21.87	3,632