Table 2.

Results from the regression analysis.

Model	(Added) Item	R	R Square	Item’s Predictive Validity (%)
Model 1	Common cold	0.675	0.431	43.1%
Model 2	Diarrhea	0.770	0.593	16.1%
Model 3	Sudden high fever	0.829	0.687	9.4%
Model 4	Headache	0.861	0.741	5.5%
Model 5	Muscle and joint pain	0.884	0.781	3.9%
Model 6	Skin problems (e.g., acne & eczema)	0.902	0.814	3.3%
Model 7	Coughing	0.922	0.850	3.6%