Jamie Falk

Cost of shingles: population based burden of disease analysis of herpes zoster and postherpetic neuralgia

BackgroundAround 30% of the population will experience herpes zoster (HZ), 10% of whom develop postherpetic neuralgia (PHN). Together, these illnesses produce a significant economic burden to the healthcare system.MethodsAdministrative healthcare data collected over the period of April 1st 1997 to March 31st 2014 were analyzed to determine the healthcare system burden of HZ using direct medical costs. Episodes of HZ were identified using international classification of disease (ICD) codes. Trends in age-adjusted (AA) HZ-rates were analyzed by piecewise-regression. Total annual and per-episode costs were determined for drug treatment, medical care, and hospitalizations within each year.ResultsThe incidence of HZ increased by 49.5% from 1997/98 to 2013/14. Piecewise-regression of AA-rates revealed a steady AA-rate of 4.7 episodes/1000 person-years (PY) from 1997/98 to a breakpoint in 2008/09, after which rates began to increase reaching 5.7 episodes/1000 PY in 2013/14.Drug costs rose significantly (p <0.03) from

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89.77/episode (95% CI:

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82.96,

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96.59) to

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127.34/episode (95% CI:

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117.24,

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137.44). Medical costs increased (p <0.0001) from

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57.98/episode (95% CI;

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55.26,

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