Background: In
this study, a previous study on the utilisation and cost of sexually
transmissible infection (STI) tests was augmented by focusing on outpatient
place of service for the most utilised tests.
Methods: Claims
for eight STI tests [chlamydia, gonorrhoea, hepatitis B virus (HBV), HIV, human
papillomavirus (HPV), herpes simplex virus type 2 (HSV2), syphilis and
trichomoniasis] using the most utilised current procedural terminology (CPT)
code for each STI from the 2012 MarketScan outpatient table were extracted. The
volume and costs by gender and place of service were then summarised. Finally,
semi-log regression analyses were used to further examine and compare costs.
Results: Females
had a higher number of test claims than males in all places of service for each
STI. Together, claims from 'Independent Laboratories', 'Office' and 'Outpatient
hospital' accounted for over 93% of all the test claims. The cost of tests were
slightly (<5%) different between males and females for most places of
service. Except for the estimated average cost for 'Outpatient hospital', the
estimated average costs for the other categories were significantly lower
(15-80%, P < 0.01) than the estimated average cost for 'Emergency Room -
Hospital' for all the STIs. Among the predominant service venues, test costs
from 'Independent Laboratory' and 'Office' were 30% to 69% lower (P < 0.01)
than those from 'Outpatient Hospital'.
Conclusions: Even
though the results from this study are not generalisable, our study shows that
almost all STI tests from outpatient claims data were performed in three
service venues with considerable cost variations.
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