Table 3.

Results of multinomial logistic regression with forward stepwise procedure on the factors associated with nightmare frequency in children

	Nightmare frequency
	< 1x/month		1-2x/month		≥ 1x/week
Variables	ORa	95% C.I.	ORa	95% C.I.	ORa	95% C.I.
Monthly family income
> HK $15,000	1		1		1
HK $10,001-$15,000	0.74	0.62–0.88	0.99	0.75–1.30	1.26	0.82–1.93
≤ HK $10,000	0.87	0.72–1.05	1.06	0.82–1.39	1.64*	1.11–2.40
Paternal frequent nightmares	1.46	0.91–2.36	1.77	0.98–3.16	3.74**	1.95–7.20
Maternal frequent nightmares	1.06	0.73–1.53	1.40	0.88–2.22	1.71#	0.96–3.04
Sleep variables in children
Sleep related daytime consequences	1.05**	1.03–1.08	1.12**	1.09–1.15	1.23**	1.18–1.28
Parasomniac symptoms	1.56**	1.45–1.68	1.91**	1.75–2.08	2.25**	2.02–2.50
Insomnia symptoms	1.30**	1.25–1.35	1.51**	1.43–1.59	1.62**	1.51–1.73

^aReference group = Children with no nightmares in the past 12 months. Paternal/maternal frequent nightmares were defined as having nightmares ≥ once per week.

^*P < 0.05,

^**P < 0.001,

^#P = 0.069.

US $1.00 = HK $7.80.