<p>In an observational study using data from Kaiser Permanente Northern California (KPNC), we evaluated the effectiveness of respiratory syncytial virus (RSV) immunoprophylaxis palivizumab, a monthly injection that eligible infants receive during the winter RSV season, on RSV-related morbidity, particularly recurrent bronchiolitis in infancy. Traditional methods such as extended Cox Proportional Hazards (CPH) models are commonly used to analyze these recurrent event data. We propose a new approach based on the nonhomogeneous Poisson process that explicitly models the impact of a past event episode and a time-varying treatment on the likelihood of future episodes of the event. Two models, the common-hazard and distinct-hazard models, are developed. These models and the extended CPH model are evaluated in simulation studies and applied to the KPNC dataset.</p>

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Modeling Sequential Dependence in Recurrent Event Data

  • Xiang Huang,
  • Hui Nian,
  • Pingsheng Wu,
  • Sherian X. Li,
  • Gabriel J Escobar,
  • Eileen M Walsh,
  • Tina Hartert,
  • Chang Yu

摘要

In an observational study using data from Kaiser Permanente Northern California (KPNC), we evaluated the effectiveness of respiratory syncytial virus (RSV) immunoprophylaxis palivizumab, a monthly injection that eligible infants receive during the winter RSV season, on RSV-related morbidity, particularly recurrent bronchiolitis in infancy. Traditional methods such as extended Cox Proportional Hazards (CPH) models are commonly used to analyze these recurrent event data. We propose a new approach based on the nonhomogeneous Poisson process that explicitly models the impact of a past event episode and a time-varying treatment on the likelihood of future episodes of the event. Two models, the common-hazard and distinct-hazard models, are developed. These models and the extended CPH model are evaluated in simulation studies and applied to the KPNC dataset.