Table 3.

Association between lifetime video game playing and other health factors, adjusting for grade and stratified by gender

		Total Sample		Boys		Girls		Gender interaction
Variable	Category	OR	p	OR	p	OR	p	p value
Grade average (Ref: A's and B's)	C's	0.66	0.8586	0.868	0.6483	1.14	0.458	0.0623
	D's and F's	0.84	0.1422	0.673	0.0278	1.08	0.9568
Extra-curricular activities	Yes	0.97	0.6836	0.99	0.9351	0.961	0.7263
Smoking, lifetime (Ref: Never)	Occasionally	0.76	0.0144	0.656	0.4695	0.71	0.003	0.1408
	Regularly	0.69	<0.0001	0.524	0.0046	1.07	0.1004	0.0028
Marijuana, lifetime	Yes	0.75	0.0002	0.653	0.0002	0.834	0.0854	0.1984
Sip of alcohol, lifetime	Yes	0.78	0.0239	0.856	0.3362	0.715	0.0245	0.3239
Current alcohol frequency (Ref: Never regular)	Light	1.05	0.7099	0.846	0.8659	1.243	0.1
	Moderate	0.9	0.4022	0.978	0.3059	0.863	0.0716
	Heavy	0.87	0.3964	0.671	0.0965	1.127	0.6305
Other drug use, lifetime	Yes	1.04	0.7675	0.832	0.3376	1.292	0.1758
Caffeine use (Ref: None)	1-2 drinks per day	1.51	<0.0001	1.929	0.0004	1.19	0.7481	0.0049
	2+ drinks per day	1.65	<0.0001	1.684	0.1366	1.51	0.0052	0.5075
Sad or hopeless 2+weeks	Yes	1.19	0.0549	1.154	0.3499	0.721	0.0024	0.0149
Serious fights	Yes	1.05	0.7501	0.778	0.1725	1.668	0.0218	0.008
Carry a weapon	Yes	1.17	0.1109	0.86	0.2056	2.095	<0.0001	<0.0001

1 Interaction term tests whether the Odds Ratios for boys and girls are significantly different from each other