Delta T, a Useful Indicator for Pharmacy Dispensing Data to Monitor Medication Adherence.

To see an overall trend in the refill behavior with increasing refill number in the population, we calculated mean ΔT per refill over all patients, the percentage of patients per refill who were “on time” (ΔT ≥ 0), and computed Spearman’s rank correlation between ΔT and increasing refill number.

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