Table 5.

Relation Between Other Study Variables and Free Protein S Levels in Multiple Regression Analysis, Second Northwick Park Heart Study, United Kingdom, 1989–2005

Independent Variablea	Effect Size (Slope)		Test Statistic	P Value	Variance Explained (R2), %
	β	SE
Total cholesterol, mmol/L	3.47	0.42	7.86	<0.001	3.99
Alcohol consumption, units/week	0.20	0.03	7.81	<0.001	1.79
Body mass indexb	0.52	0.12	4.36	<0.001	1.18
Triglycerides, mmol/L	1.43	0.35	4.13	<0.001	0.60
Factor VIIc, % standard	0.04	0.01	2.75	0.006	0.12
Systolic blood pressure, mm Hg	0.04	0.02	2.18	0.030	0.21
Constant	61.20	4.42	−1.2	0.234

Abbreviation: SE, standard error.

^aTotal variance explained (including clinic): R² = 17.30.

^bWeight (kg)/height (m)².