The effect of nuchal cord on perinatal mortality and long-term offspring morbidity.

OBJECTIVE: To evaluate perinatal and long-term cardiovascular and respiratory morbidities of children born with nuchal cord. STUDY DESIGN: A large population-based cohort analysis of singleton deliveries was conducted. Maternal and birth characteristics, as well as cardiovascular and respiratory morbidity incidence were evaluated. Kaplan-Meier survival curves were used to compare cumulative hospitalization incidence between groups. Cox regression models were used to control for possible confounders and follow-up length. RESULTS: 243,682 deliveries were included. Of them, 34,332 (14.1%) were diagnosed with nuchal cord. Perinatal mortality rate was comparable between groups (0.5 vs. 0.6%, p = 0.16). Kaplan-Meier survival curves demonstrated no significant differences in cumulative cardiovascular or respiratory morbidity incidence between groups (log rank p = 0.69 and p = 0.10, respectively). Cox regression models reaffirmed a comparable risk for hospitalization between groups (aHR = 0.99 (95% CI 0.85-1.14, p = 0.87) and aHR = 0.97 (95% CI 0.92-1.02, p = 0.28). CONCLUSIONS: Nuchal cord is not associated with higher rate of perinatal mortality nor long-term cardiorespiratory morbidity.