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Fig. 2 | BMC Public Health

Fig. 2

From: Air pollution, residential greenness, and metabolic dysfunction biomarkers: analyses in the Chinese Longitudinal Healthy Longevity Survey

Fig. 2

The interaction model of PM2.5 and NDVI on abdominal obesity in the longitudinal analysis. Note: The figure was based on the logistic regression for abdominal obesity including the interaction term of PM2.5 and NDVI adjusting for biomarker measurement year, baseline age, sex, ethnicity, education, marriage, residence, exercise, smoking, alcohol drinking, and GDP per capita. Higher PM2.5 was associated with higher probability of AO, and the effect size decreased with the increase of the greenness level for exposure beyond 30 μg/m3. Higher NDVI was associated with lower probability of AO and the effect size was stronger under relatively higher PM2.5 exposure. We used R package "interactions" to draw the figure.

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