Table 3.

Associations between patient characteristics and time to colonoscopy follow-up after positive fecal blood test in PROSPR health care systems, 2011–2012 (47,827)a

Characteristic at positive fecal blood testHR (95% CI)
Age (years)
 50–54Reference
 55–591.02 (0.98–1.05)
 60–640.98 (0.95–1.02)
 65–690.98 (0.95–1.02)
 70–750.90 (0.87–0.94)
 76–840.65 (0.61–0.69)
 85–890.34 (0.29–0.39)
Gender
 FemaleReference
 Male1.03 (1.00–1.05)
Charlson comorbidity score
 0Reference
 10.93 (0.91–0.96)
 20.87 (0.84–0.90)
 ≥30.70 (0.67–0.72)
BMI (kg/m2)
 <25Reference
 25–<301.06 (1.03–1.09)
 30–<351.07 (1.04–1.10)
 ≥351.01 (0.97–1.04)
Race/ethnicity
 White, non-HispanicReference
 Hispanic (any race)1.01 (0.98–1.04)
 Asian/Pacific Islander0.97 (0.94–1.00)
 Black0.98 (0.94–1.02)
 Other0.96 (0.84–1.09)
Prior colorectal cancer screening
 NoReference
 Yes1.30 (1.26–1.34)
Health care system
 Kaiser Permanente Southern CaliforniaReference
 Group Health0.64 (0.61–0.68)
 Kaiser Permanente Northern California0.99 (0.97–1.01)
 Parkland Health and Hospital System—University of Texas Southwestern Medical Center0.24 (0.18–0.32)

Abbreviations: HR, hazard ratio; PROSPR, Population-Based Research Optimizing Screening through Personalized Regimens.

  • aMultivariate regression limited to persons with complete covariate information.