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RATIONALE Single-site clinic-based studies suggest an increasing prevalence of pulmonary nontuberculous mycobacteria (NTM) disease, but systematic data are lacking. OBJECTIVES To describe prevalence and trends for NTM lung disease at four geographically diverse integrated heath care delivery systems in the United States. METHODS We abstracted(More)
OBJECTIVE The purpose of this study was to examine whether the recurrence risk of preterm premature rupture of membranes (PPROM) is modified by the interpregnancy interval (IPI). STUDY DESIGN We used the Missouri 1989-1997 longitudinally linked data to examine the recurrence risk of PPROM in women with first 2 (n = 150,929) and first 3 (n = 30,011)(More)
We evaluated the relationship of infant status at birth to neonatal morbidity and long-term development in 246 low birth weight infants (600 to 1750 gm). Nineteen percent of infants had 1-minute Apgar scores of less than or equal to 3, and 8% had an umbilical artery pH of less than or equal to 7.2. Acidosis was associated with an increased risk of grade 3(More)
CONTEXT Epidemiologic studies have reported that cigarette smoking is inversely associated with Parkinson disease (PD). However, questions remain regarding the effect of age at smoking onset, time since quitting, and race/ethnicity that have not been addressed due to sample size constraints. This comprehensive assessment of the apparent reduced risk of PD(More)
OBJECTIVE To examine the association between chorioamnionitis and childhood asthma based on gestational age at birth and race/ethnicity. DESIGN A retrospective cohort study using the Kaiser Permanente Southern California (KPSC) Matched Perinatal records. SETTING Kaiser Permanente Southern California, Pasadena, California. PARTICIPANTS All singleton(More)
OBJECTIVE To examine trends in primary cesarean deliveries by indications and race/ethnicity. STUDY DESIGN We examined temporal trends in primary cesarean deliveries from 1991 through 2008 among singleton births (n = 540,953) in Kaiser Permanente Southern California hospitals using information from maternal hospitalizations and infant birth certificates.(More)
AIMS The association of trauma and physical activity with ALS is controversial. We explored the relation in a pilot case-control study. MATERIAL AND METHODS ALS patients were selected from a university muscle disease clinic and paired with two matched controls: one from the clinic, but having different diseases, and one from the community. RESULTS We(More)
BACKGROUND To understand racial and ethnic disparities in health care utilization and their potential underlying causes, valid information on race and ethnicity is necessary. However, the validity of pediatric race and ethnicity information in administrative records from large integrated health care systems using electronic medical records is largely(More)
Endometrial biopsy specimens (n = 62) were evaluated by five pathologists to assess the effect of interobserver variation on histologic dating of the endometrium. The potential effect of this variation on the diagnosis of luteal phase defects (LPDs) and resulting clinical management was also determined. Mean (+/- standard error) interobserver variation was(More)