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Quality and completeness indices.

Rosario Tumino¹, Stefano Ferretti

¹Registro tumori della Provincia di Ragusa.

Epidemiologia E Prevenzione

|July 30, 2004

Summary

Cancer registry data quality in Italy improved significantly between 1986 and 1997. Key indicators like morphological verification increased, while death certificate-only cases and mortality incidence ratios decreased, reflecting better cancer surveillance.

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Area of Science:

Epidemiology
Public Health
Cancer Surveillance

Background:

Cancer registries are crucial for monitoring cancer incidence and outcomes.
Assessing the quality of cancer registry data is essential for reliable epidemiological studies.
The Italian Network of Cancer Registries (AIRT) collects data on cancer cases across Italy.

Purpose of the Study:

To evaluate the time trends of key quality indicators within the AIRT pool from 1986 to 1997.
To identify improvements in data completeness, accuracy, and representativeness over time.
To analyze these trends by sex, specific cancer sites, and age groups (75+ years).

Main Methods:

Analysis of time trends for selected quality indices in the AIRT database.
Calculation of percentages for morphological verification and death certificate-only (DCO) cases.
Assessment of the mortality-to-incidence ratio and cases with unknown primary site.
Stratification of data by sex, cancer site, and age.

Main Results:

Morphological verification rates increased from 75% to 83% (males) and 77% to 85% (females).
Death certificate-only (DCO) cases decreased to approximately 3% of the total case series.
The mortality-to-incidence ratio declined significantly in both sexes.
Cases with unknown primary site also showed a decreasing trend.

Conclusions:

The quality of cancer registry data in Italy showed a marked improvement during the study period (1986-1997).
These improvements reflect enhanced Cancer Registry activities and the broader Italian Health System's performance.
The findings support the reliability of AIRT data for epidemiological research and cancer control planning.

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