A survey regarding orthodontic treatment among contemporary college freshmen in China

BMC Oral Health

Table 1 Demographics of participants returning questionnaires (n = 3308)

	N	%
Sex (N_a = 3308)
Female	1784	53.93
Male	1524	46.07
Major (N_a = 3308)
Science	375	11.34
Engineering	887	26.81
Medicine	649	19.62
Agronomy	99	2.99
Literature	242	7.32
History	149	4.50
Philosophy	150	4.53
Economics	209	6.32
Management	210	6.35
Law	167	5.05
Education	88	2.66
Art	83	2.51
Economic Administrative Regions (N_a = 3308)
The eastern region	1032	31.20
The central region	493	14.90
The northeast region	191	5.77
The western region	1533	46.35
Hong Kong, Macao, Taiwan and Overseas	59	1.78

ISSN: 1472-6831