Table 1.
Comorbidities included in the scoring system with revised weighted scores for severe maternal morbidity and nontransfusion severe maternal morbidity.
| Comorbidity | Score for SMM | Score for non-transfusion SMM |
|---|---|---|
| Placenta accreta spectrum | 27 | 43 |
| Pulmonary hypertension | 20 | 33 |
| Chronic renal disease | 17 | 30 |
| Cardiac disease, preexisting | 14 | 25 |
| HIV/AIDS | 13 | 13 |
| Preeclampsia with severe features | 12 | 18 |
| Placental abruption | 9 | 13 |
| Bleeding disorder, preexisting | 9 | 11 |
| Anemia, preexisting | 9 | 6 |
| Twin/multiple pregnancy | 9 | 5 |
| Preterm birth (< 37 weeks) | 8 | 13 |
| Placenta previa, complete or partial | 8 | 3 |
| Neuromuscular disease | 6 | 13 |
| Asthma, acute or moderate/severe | 5 | 12 |
| Preeclampsia without severe features or gestational hypertension | 5 | 7 |
| Connective tissue or autoimmune disease | 4 | 8 |
| Uterine fibroids | 4 | 7 |
| Substance use disorder | 4 | 4 |
| Gastrointestinal disease | 3 | 7 |
| Chronic hypertension | 3 | 6 |
| Major mental health disorder | 3 | 4 |
| Preexisting diabetes mellitus | 2 | 6 |
| Thyrotoxicosis | 2 | 2 |
| Previous cesarean birth | 2 | 0 |
| Gestational diabetes mellitus | 1 | 1 |
| Delivery BMI ≥ 40 | 1 | 0 |
| Maternal age ≥ 35 years | 0 | 1 |