Table 4.

Relationship between Different Green Index and Mortality.

Greenness Index	All-Cause a	Cardiovascular a	Respiratory a	Lung Cancer a
NDVI	0.901 ¶ (0.862, 0.941)	0.892 ‡ (0.817, 0.975)	0.721 ¶ (0.632, 0.824)	0.871 (0.735, 1.032)
Forest Area (%)	0.883 ¶ (0.866, 0.900)	0.898 ¶ (0.880, 0.917)	0.903 ¶ (0.883, 0.923)	0.884 ¶ (0.864, 0.904)
Forest or Park Area (%)	0.884 ¶ (0.867, 0.901)	0.898 ¶ (0.88, 0.917)	0.903 ¶ (0.883, 0.923)	0.885 ¶ (0.865, 0.905)

Abbreviations: NDVI, normalized difference vegetation index; RR: risk ratio; CI, confidence interval. ^a All models were adjusted for total population, age, sex ratio, taxable income, precipitation, time trend, and temperature. Estimation of risk ratio (RR) was based on one unit increment on NDVI and 10% increment on area of the forest/park. Significant of risk ratio (^‡ p value < 0.05, ^¶ p value < 0.001).