. 2011 Aug 26;11:144. doi: 10.1186/1471-244X-11-144

Table 7.

Gaming and self-reported health impairment and DAS responses

Variables	Total sample of population		Over threshold DAS (+)		Below threshold DAS (-)		Univariate analysis		Multivariate analysis
	Mean	S.D.	Mean	S.D.	Mean	S.D.	Statistical tests	Corrected p-value	Odds Ratio (95%CI)	Corrected p-value

Effect on sleep
Hours slept per night	7.1 (4-14)	1.3	6.8	1.4	7.2	1.3	t = 2.74	0.043	0.78	0.004
									(0.66-0.93)
	Number	%	Number	%	Number	%
Restful sleep
no	86	19.1	46	53.5	40	46.5	χ²= 36.82	< 10-3	0.23	< 10-3
yes	364	80.9	76	21.1	285	78.9	1df		(0.14-0.38)
Deprivation of sleep due to play
no	285	63.2	55	19.4	228	80.6	χ²= 24.01	< 10-3	2.83	< 10-3
yes	166	36.8	67	40.9	97	59.1	1df		(1.83-4.38)
Daytime sleepiness
no	348	77.3	74	21.5	270	78.5	χ²= 27.712	< 10-3	3.10	< 10-3
yes	102	22.7	49	48	53	52	1df		(1.92-5.00)
Effect on mood
Happier	87	24.1	31	36.5	54	63.5	χ²= 58.82	< 10-3	1	< 10-3
More irritable	45	12.5	27	60	18	40	4df		2.56
									(1.19-5.48)
More anxious	8	2.2	4	50	4	50			1.69
									(0.39-7.34)
More sad	17	4.7	15	88.2	2	11.8			12.48
									(2.64-59.06)
More calm	204	56.5	38	18.8	164	81.2			0.39
									(0.22-0.69)
Effect on health
None	333	74.7	67	20.2	264	79.8	χ²= 37.41	< 10-3	1	< 10-3
Psychological effect	73	16.4	32	45.1	39	54.9	3df		3.21
									(1.86-5.56)
Physical effect	29	6.5	14	48.3	15	51.7			3.23
									(1.44-7.22)
Both effects	11	2.5	8	72.7	3	27.3			14.09
									(2.89-68.61)
Confusing real life vs fiction
no	422	93.8	104	24.9	314	75.1	χ²= 20.51	< 10-3	5.01	< 10-3
yes	28	6.2	18	64.3	10	35.7	1df		(2.21-11.34)

Odds ratio and p-value were adjusted for age, sex and educational level.