Table 4.
Unadjusted and adjusted models for 60-day postpartum readmission for specific complications
| Unadjusted risk ratio (95% CI) | Adjusted risk ratio (95% CI) | |||
|---|---|---|---|---|
| Severe maternal morbidity | ||||
| Type 1 diabetes | 3.44 | 3.04, 3.89 | 2.09 | 1.85, 2.37 |
| Type 2 diabetes | 2.97 | 2.75, 3.21 | 1.57 | 1.45, 1.70 |
| Gestational diabetes | 1.47 | 1.42, 1.53 | 1.19 | 1.14, 1.23 |
| Unspecified | 3.05 | 2.47, 3.77 | 1.90 | 1.53, 2.35 |
| No diabetes | Reference | Reference | ||
| Wound complications | ||||
| Type 1 diabetes | 3.30 | 2.86, 3.82 | 1.39 | 1.20, 1.61 |
| Type 2 diabetes | 5.42 | 5.07, 5.80 | 2.13 | 1.99, 2.29 |
| Gestational diabetes | 1.73 | 1.66, 1.80 | 1.25 | 1.20, 1.30 |
| Unspecified | 4.84 | 3.98, 5.89 | 2.34 | 1.92, 2.85 |
| No diabetes | Reference | Reference | ||
| Diabetic complications | ||||
| No diabetes | 0.00 | 0.00, 0.00 | 0.00 | 0.00, 0.00 |
| Type 2 diabetes | 0.13 | 0.11, 016 | 0.20 | 0.16, 0.24 |
| Gestational diabetes | 0.01 | 0.00, 0.01 | 0.01 | 0.01, 0.01 |
| Unspecified | 0.52 | 0.40, 0.66 | 0.73 | 0.50, 0.94 |
| Type 1 diabetes | Reference | Reference | ||
| Hypertensive diseases of pregnancy | ||||
| Type 1 diabetes | 2.92 | 2.78, 3.07 | 1.77 | 1.69, 1.87 |
| Type 2 diabetes | 2.55 | 2.47, 2.63 | 1.46 | 1.42, 1.51 |
| Gestational diabetes | 1.34 | 1.33, 1.36 | 1.16 | 1.14, 1.17 |
| Unspecified | 2.63 | 2.42, 2.87 | 1.73 | 1.59, 1.89 |
| No diabetes | Reference | Reference | ||
| Venous thromboembolism | ||||
| Type 1 diabetes | 1.10 | 0.68, 1.76 | 0.64 | 0.40, 1.03 |
| Type 2 diabetes | 2.15 | 1.77, 2.62 | 1.10 | 0.90, 1.35 |
| Gestational diabetes | 1.50 | 1.38, 1.62 | 1.19 | 1.10, 1.30 |
| Unspecified | 1.79 | 0.98, 3.27 | 1.08 | 0.59, 1.98 |
| No diabetes | Reference | Reference | ||
In adjusted analyses the five study models in the table included demographic, hospital and clinical factors in Table 2. For the severe maternal morbidity analysis, patients with these outcomes during the delivery hospitalization were excluded to avoid misclassification. Similarly, for the thromboembolism analysis patients with an acute event during the delivery hospitalization were excluded; history of venous thromboembolism prior to the delivery hospitalization was accounted for in the model. Diabetic complications including diabetes including diabetic ketoacidosis, hyperglycemic hyperosmolar syndrome, and coma. Factors included in the adjusted analyses for specific morbidity outcomes included same factors in the primary adjusted analysis including patient demographics, hospital factors, and medical and obstetrical risk factors.