TABLE 4.

Correlates of the MDS using multiple linear regression with a bootstrap model selection procedure¹

Variable	β ± SE2	Adjusted mean MDS [95% CI]	P	Reliability (%)3
Intercept	3.27 ± 0.43
Currently smoking	0.68 ± 0.33		0.04	79
No		4.2 [3.9, 4.5]
Yes		3.5 [2.8, 4.1]
Meet moderate physical activity guidelines	−0.32 ± 0.17		0.05	76
No		3.7 [3.3, 4.1]
Yes		4.0 [3.5, 4.5]
Age4	0.02 ± 0.01	4.0 [3.4, 4.6]	0.03	63
Diabetes	0.55 ± 0.31		0.08	63
No		4.1 [3.8, 4.5]
Yes		3.6 [2.9, 4.2]
Plasma GSSG5	3.01 ± 1.59	3.4 [2.6, 4.2]	0.06	58
Income ≥$100,000	−0.32 ± 0.15		0.03	58
No		3.7 [3.3, 4.1]
Yes		4.0 [3.6, 4.4]
Plasma CySS/GSH6	−0.007 ± 0.003	2.9 [2.1, 3.8]	0.02	52

¹Covariates with reliability <50% were not included in the final MDS multivariable model. CySS, cystine; GHS, glutathione; GSSG, glutathione disulfide; MDS, Mediterranean Diet Score.

²Estimated regression coefficient (β) ± SE for MDS.

³Percentage of time each factor appears in 1000 multiple linear regression models. Factors appearing in ≥50% of models are reliable.

⁴Mean = 48.5 y.

⁵Mean = 0.05 µmol/L.

⁶Mean = 50.6.