Table 5.

The relationship between frequency of a well-balanced diet and prevalence of vitamin supplement usage.

	n	I Currently Use It.	I Used to Use It, but Not Now.	I Have Never Used It.	p-Value
Almost every day	4900	25.7	21.2	53.1	<0.001
4–5 days a week	3007	25.5	26.3	48.1
2–3 days a week	3078	20.3	25.2	54.5
Rarely	3756	13.4	15.2	71.3

The difference among groups was examined using the chi-square (χ²) test.