Table 2.

Odds ratios and 95% confidence intervals for high depressive symptoms associated with a 1-IQR^a increase in greenness, measured by peak and annual average NDVI at 250 and 1250 meters, in 9,385 adolescents living in the United States in 1999 (N=1,038 cases)

	Crude	Parsimoniousb	Fully Adjustedc
Peak NDVI d	OR (95% CI)	OR (95% CI)	OR (95% CI)
250me	0.88 (0.81, 0.96)	0.91 (0.82, 1.02)	0.91 (0.82, 1.02)
1250m	0.87 (0.81, 0.94)	0.89 (0.79, 0.99)	0.88 (0.79, 0.98)
Annual Average
NDVIf
250mg	0.92 (0.85, 1.00)	0.93 (0.86, 1.02)	0.93 (0.86, 1.02)
1250m	0.90 (0.83, 0.98)	0.90 (0.83, 0.99)	0.90 (0.83, 0.99)

^a1-IQR for Peak 250m: 0.232; Peak 1250m: 0.191; Annual Average 250m: 0.130; Annual Average 1250m: 0.115

^bAdjusted for census region, census tract percent white, estimated PM_2.5, participant race, paternal education, maternal history of depression

^cAdjusted for census region, census tract percent white, census tract median income, census tract median home value, census tract percent college degree, census tract urbanicity, estimated PM_2.5, participant race, participant gender, household income, paternal education, maternal history of depression

^dPeak NDVI is determined from July values

^e38 subjects not included because of missing NDVI values

^fAnnual Average NDVI is calculated as the average of one measurement from each of the four seasons

^g61 subjects not included because of missing NDVI values