After enrollment, food frequency questionnaires (FFQs) were used to assess dietary intake.
For these analyses, we did not include spouses because they were not asked at enrollment about frequency and duration of use of specific chemicals.
As such, means and s.d.'s are employed for continuous variables (age, body mass index, years between CD diagnosis and enrollment), and frequencies and percentages are employed for categorical outcomes (gender, race, involved intestinal segment(s), disease severity, immunomodulator treatment, prednisone treatment, narcotic analgesic therapy, and health resource utilization).
Before enrollment, the FS frequency had a range 2 4 times in the first stratification.
Population-based controls (n = 741) in the WREN study were female Group Health enrollees without diagnosed endometriosis, randomly selected from computerized Group Health enrollment databases and frequency matched to cases in 5-year age groups.
The range of FS frequency before enrollment was 2 15 times.
The FS onset age and FS frequency before enrollment were divided into two stratifications.
Descriptive analysis included frequency by enrollment category, disaster-related exposures, and major self-reported health findings.
Hence, the FS onset age and FS frequency before enrollment were considered confounding factors for efficacy assessment.
Based on a pre-determined frequency matched enrollment scheme, siblings were recruited to represent the age and sex distribution of HCT recipients.
