Table 4. Multiple linear regression analysis of alcohol consumption (model 1) and present illness (model 2).

Source Variance	df	SS	MS	F	p-value
Model 1
Regression	2	1021.555	1021.555	8.155	<.01
Residual	401	125.262	125.262
Total	403	51251.752
Model 2
Regression	2	1526.017	763.008	6.138	<.01
Residual	401	49725.735	124.314
Total	403	51251.752

Model 1 R =0.141, R2 Square = 0.020, S.E = 11.192, n =403, Model 2 R = 0.173, R2 Square = 0.030, S.E = 11.149, n =403