Table 2.

Adjusted Hazard Ratios (95% Confidence Intervals) for Schizophrenia According to Childhood NDVI and Polygenic Risk Score for Schizophrenia (n = 19 746)

Adjusted for	Childhood NDVIa	Polygenic Risk Scoreb
Age, gender, calendar year	0.40 (0.32–0.50)	1.26 (1.21–1.32)
Age, gender, calendar year, parental history of mental disorder, and parental socioeconomic status	0.52 (0.40–0.66)	1.24 (1.18–1.30)
Age, gender, calendar year, parental history of mental disorder, parental socioeconomic status, and mutually adjusted	0.54 (0.42–0.70)	1.24 (1.18–1.30)

Note: NDVI, normalized difference vegetation index.

^aThe estimate for childhood NDVI measure the decreased risk of schizophrenia associated with 1-unit increase in mean NDVI during the first 10 years of life.

^bThe estimate for polygenic risk score measure the increased risk of schizophrenia associated with 1 SD increase in polygenic risk score. The estimate was additionally adjusted for first 10 genomic principal components.