Key result
Maternal nulliparity did not significantly influence the likelihood of neonatal brachial plexus palsy persistence at 1 year compared to multiparity (87% vs. 88%; aOR 1.357, 95% CI 0.297-6.208).
Why the study?
It was unknown whether the persistence of neonatal brachial plexus palsy at 1 and 2 years differs between children of nulliparous versus parous women.
Does maternal parity influence the persistence of neonatal brachial plexus palsy at 1 and 2 years in children?
Cohort (n=337)
No
Does maternal parity influence the persistence of neonatal brachial plexus palsy at 1 and 2 years in children?
Odds Ratio: 1.357 (95% CI 0.297–6.208)
Absolute Event Rate: 87% vs 88%
Maternal parity does not influence the likelihood of neonatal brachial plexus palsy persistence at 1 and 2 years.
Parity was not associated with NBPP persistence at 1 year; leaves open its role at 2 years or in counseling.
Objective Our objective was to compare persistence of neonatal brachial plexus palsy (NBPP) at 1 and 2 years in children of nulliparous versus parous women. Study Design We conducted a retrospective cohort study of children diagnosed with NBPP followed at the University of Michigan, Interdisciplinary Brachial Plexus Program (UM-BPP). Self-reported demographics, delivery history, including birth weight (BW) < versus ≥ 9 lbs, and presence of shoulder dystocia (SD) were recorded. Student's t-test and Chi-square test with odds ratio (OR) with 95% confidence intervals (CI) were calculated for comparisons of maternal, neonatal, and peripartum characteristics. Results Of 337 children with NBPP, 43% (146) were of nulliparas and 57% (191) of multiparas. At 1 year, children with persistent NBPP were similar in both groups (87% vs. 88%, aOR 1.357, 95% CI: 0.297–6.208). Persistent NBPP was not significantly different among nulliparous and multiparous women at 2 years (97% vs. 92% respectively, aOR 0.079, 95% CI: 0.006–1.050). Conclusion In one of the largest cohorts of NBPP, maternal parity did not influence the likelihood of NBPP persistence at 1 and 2 years.
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McLaren et al. (2019) conducted a cohort in Neonatal brachial plexus palsy (n=337). Nulliparity vs. Multiparity was evaluated on Persistence of neonatal brachial plexus palsy at 1 year (aOR 1.357, 95% CI 0.297-6.208). Maternal nulliparity did not significantly influence the likelihood of neonatal brachial plexus palsy persistence at 1 year compared to multiparity (87% vs. 88%; aOR 1.357, 95% CI 0.297-6.208).
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