Fig. 2
From: Drinking water nitrate and risk of pregnancy loss: a nationwide cohort study
Adjusted hazard ratios of pregnancy loss by drinking water nitrate exposure (log scale) in pregnancy with 1Â mg/L as reference. Exposures below the highest detection limit 1Â mg/L and above 50Â mg/L are not shown, but included in the model. Grey scale areas represent the CI. Splines were adjusted for age, education, occupation, population density, BMI, smoking and alcohol. Robust standard errors accounted for dependencies between pregnancies by the same woman