Table 2.

Percentage of habitual daytime napping by different characteristics

Characteristics	Participants	Habitual daytime napping		x2	P
		n	Percentage (95% CI)
Age range (years)				89.61	< 0.0001
30–49	23,099	1036	4.49 (4.22–4.75)
50–59	18,516	857	4.63 (4.33–4.93)
60–79	12,301	864	7.02 (6.57–7.48)
Sex				339.20	< 0.0001
Males	22,573	1619	7.17 (6.89–7.45)
Females	31,343	1138	3.63 (3.46–3.80)