A successful connection was defined as both the patient and physician connecting for 1 minute or longer. Low neighborhood socioeconomic status (SES) was defined by patient residential US Census tract with 20% or more households in poverty or 25% or more residents without a high school education. The final multivariable model also included comorbidity burden (high comorbidity burden: relative rate [RR], 0.95; 95% CI, 0.93-0.96; moderate comorbidity burden: RR, 0.99; 95% CI, 0.98-1.00; low comorbidity burden: reference), imputed comorbidity burden (RR, 0.84; 95% CI, 0.79-0.88), Medicaid insurance (RR, 0.93; 95% CI, 0.91-0.95), and any patient portal access by a proxy in the prior year (RR, 1.02; 95% CI, 1.01-1.03). The unadjusted RRs, taking into account clustering of patients by physician, were 1.02 (95% CI, 1.00-1.03), 1.07 (95% CI, 1.05-1.08), and 1.10 (95% CI, 1.08-1.12) in the second through fourth quartiles for medical assistant (MA) rooming, respectively.