OBJECTIVES: To test the association between time preference rates and diagnosis of condition used in the scenario to elicit time preference rates. We hypothesised scenarios that are more familiar may lead to higher estimates, as they place a higher value on the future benefits of adherence.

METHODS: Data from two empirical surveys that estimated time preference using a scenario of delays in starting antiepileptic medication and reduction in seizure frequency were compared for samples of: (i) hypertensive adult patients in England or Wales; and, (ii) UK patients with epilepsy. Time preference rates were elicited using a questionnaire containing 4-items to derive estimates for a 3-year and a 6-year delay. The same questionnaire was hosted within two independent online surveys. Patients were matched using propensity scoring based on, age, sex, and employment status. Associations between time preference rate and condition were assessed using an independent two-sample t-test with equal variances, using the propensity score matched sample for both the 3-year and the 6-year delay.

RESULTS: CONCLUSIONS: Evidence on the association between experience of the condition described in the hypothetical scenario and estimated time preference rates suggests people with experience of condition have higher time preference.