Objectives: to identify the determinants of over and under-use of Pap test and mammography in the screening programme target population.
Design: cross-sectional study. SETTING E PARTICIPANTS: we used data from the National Health interview conducted by the Italian National Institute of Statistics in 2012-2013 obtaining nation-wide representative samples of the female resident population aged 25-64 years (No. 32,831; target age of Pap test) and 50-69 years (No. 16,459; target age of mammography).
Main outcome measures: overall coverage: proportion of women in the target age with at least one test in lifetime; appropriate coverage: proportion of women reporting to have at least one or more tests following the first one with the recommended frequency (three and two years for Pap test and mammography, respectively); over-use: women reporting to repeat test at higher frequency; under-use: women reporting not having ever had a test or having test at longer intervals. For frequency outcomes, only women aged 28-64 years and 52-69 years were included for Pap test and mammography, respectively.
Results: 11.9% of women have Pap test at the recommended frequency, 48.5% at shorter intervals, and 19.6% at longer intervals than recommended, while 20.0% never had a Pap test at all (39.6% under-use). 41.1% of women have a mammography at the recommended interval, 18.4% at shorter intervals, and 20.2% at longer intervals, while 20.3% never had a mammography at all. For both tests, in the North-East higher appropriate coverage and less over-use are observed, while in the South more under-use is highlighted. Young, foreigners, single, less educated, and unoccupied women have, at the same time, more over- and under-use for Pap test. Foreigner women reporting economic difficulties and single women have more mammography over and under-use.
Conclusions: Pap test and, in a minor measure, mammography over-use are relevant in Italy, while large part of the population is still not covered.