Dynamics of changes in colorectal cancer incidence in the Podkarpackie region (Poland) in the years 1963–2014

Introduction
Colorectal cancer (CRC) in Podkarpackie in Poland is the third most common cancer in males (12.6% cancer diagnoses), and second among women (10.1% of recognised cancers). Aim: An analysis of the trends in CRC incidence in the years 1963-2014 in Podkarpackie in the south-east of Poland.

Material and methods
A total of 19,460 CRC cases recorded in the period 1963–2014 in the National Cancer Registry as ICD C18-C21 cases were analysed.

Results
The overall cancer incidence rate in Podkarpackie Province was 20.4 in men and 16.8 in women per 100 thousand, and was lower than the Polish population by 12.4% for men and by 17.6% for women, respectively, in comparison to general Polish population rates. The mean age of CRC diagnosis grew from 64.0 years in males and 64.5 years in females in 1963–1969 to 67.6 and 68.4 years in 2010–2014, respectively.

Conclusions
In 1964–2014 the CRC incidence rate in the Podkarpackie region increased 12.7-fold in males and 8.1-fold in females. There was an observed stable growth of average annual increase in the CRC incidence rate in men in 1963–1999, but since 2000 a decline in this rate has been observed. In females there was a tendency towards increased average CRC incidence rate in Podkarpackie since 2000, while in the whole country the female population presented a stable decrease of this coefficient.