Table 5.

Multiple linear regressions of knowledge and illness perception in sodium intake variations (adjusted to energy intake).

Variables	Multiple linear regressions				R 2	Adjusted R square
	Beta	Std. error	t	P value
Controlled group (N = 433)
Model 1
Illness perception	−0.232	2.4	−4.9	P < 0.001	0.136	0.132
Knowledge	−0.222	6.7	−4.7	P < 0.001
Model 2	Model 1 + weight, age, diseases duration, gender				0.152	0.140
Uncontrolled group (N = 238)
Model 1
Illness perception	−0.362	3.6	−3.6	P < 0.001	0.472	0.467
Knowledge	−0.346	5.5	−3.4	P = 0.001
Model 2	Model 1 + weight, age, diseases duration, gender				0.498	0.485