Figure 3.

Risk of (A) at least one SMM indicator, (B) preterm birth (gestational age<37 weeks), and (C) low birthweight (weight<2500 grams) by eGFR (ml/min per 1.73 m²) and proteinuria categories. Severe Maternal Morbidity indicators were measured between 20 weeks of gestation and 42 days after the index delivery. Preconception proteinuria in the 1–2 years before conception date was measured using a hierarchical combination of ACR or PCR on the basis of availability. Proteinuria values were categorized as severe (ACR value>30 mg/mmol or PCR value >50mg/mmol or urine dipstick 2+ or more), moderate (ACR value 3–30 mg/mmol or PCR value 15–50 mg/mmol or urine dipstick 1+), normal/mild (ACR value<3 mg/mmol or PCR value<5 mg/mmol or urine dipstick normal), and missing, respectively.