Progress in Orthodontics

Table 1 Demographic data and clinical characteristics of the participants of the study

From: Clinical and radiographic comparison of the effects of two types of fixed retainers on periodontium - A randomized clinical trial

		Study groups
		SW (n = 15)		FRC (n = 15)
		Mean or %	SD	Mean or %	SD
Gender (%)	Male	26.6		40
Gender (%)	Female	73.4		60
Age (years)		15.7	2.1	16.2	1.9
Treatment	Extraction	46.6		40
Treatment	Non-extraction	53.4		60

SW, spiral wire group; FRC, fiber-reinforced composite group.

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