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Epidemiology of colorectal cancer: comparison of Czech regions

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svod.cz: epidemiology of malignant tumours in the Czech Republic

J. Mužík, L. Dušek, L. Šnajdrová

Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic

Colorectal cancer (CRC) incidence rates are not uniform in individual regions of the Czech Republic. Between 2011 and 2015, CRC incidence rates ranged between 68 and 85 new cases per 100,000 population in most regions – with the exception of the Plzen Region, where CRC incidence rates reached up to 91.4 new cases per 100,000 population. The Plzen Region and the Karlovy Vary Region reported the highest CRC mortality rates among regions of the Czech Republic (Figure 1). A high burden of colorectal cancer in the Plzen Region has been recorded for more than 20 years, and thus the influence of statistical error or random fluctuation can be ruled out. Moreover, high incidence rates correspond to high mortality rates, which are independently checked using the records from the Czech Death Records Database. Reasons for these regional differences have not been satisfactorily explained yet, nevertheless they correspond to incidence rates of all cancers in individual regions. Table 1 shows the current epidemiology of colorectal cancer in Czech regions between 2011 and 2015.

Figure 1: Regional differences in colorectal cancer incidence and mortality rates in the period 2011–2015. Data source: CNCR

Table 1: Epidemiology of colorectal cancer in Czech regions in the period 2011–2015. Data source: CNCR

Region

Annual incidence rate in the period 2011–2015

Annual mortality rate in the period 2011–2015

Mortality to incidence ratio

Prevalence rate in 2015

Proportion of stages (%)
in the period 2011–2015

Absolute number

Rate per 100.000 population

Absolute number

Rate per 100.000 population

Absolute number

Rate per 100.000 population

I

II

III

IV

Unknown*

PHA 889 71.2 408 32.7 0.46 7,018 555.88 21.6 26.0 25.5 21.8 5.1
SCK 879 67.8 471 36.3 0.54 6,660 504.27 22.8 26.6 27.0 16.6 6.9
JHC 532 83.6 268 42.1 0.50 4,137 649.15 26.7 22.9 22.2 18.5 9.7
PLZ 524 91.4 297 51.7 0.57 4,170 724.38 27.3 27.1 23.2 20.5 2.0
KVK 256 85.0 139 46.0 0.54 1,931 646.89 24.7 27.1 24.7 21.1 2.4
UST 639 77.4 320 38.7 0.50 4,689 569.48 22.3 25.5 24.5 20.7 7.0
LIB 344 78.3 159 36.3 0.46 2,622 597.06 27.9 22.5 20.0 15.9 13.6
KHK 437 79.1 210 37.9 0.48 3,329 603.88 23.4 21.2 26.8 20.8 7.7
PAR 380 73.7 182 35.3 0.48 3,116 603.59 21.2 20.0 26.8 8.5 23.5
VYS 398 78.0 169 33.1 0.42 3,326 652.79 24.5 21.6 25.7 18.8 9.4
JMK 907 77.6 421 36.0 0.46 7,097 604.74 22.8 21.0 23.4 20.6 12.2
OLK 518 81.3 260 40.9 0.50 4,205 662.11 25.6 25.1 23.9 14.1 11.2
ZLK 478 81.4 218 37.1 0.46 3,917 669.77 24.8 21.6 24.1 16.7 12.9
MSK 1,017 83.1 410 33.5 0.40 7,909 650.83 26.8 23.4 23.5 19.3 7.0
ČR 8,198 78.0 3,933 37.4 0.48 64,126 608.24 24.3 23.8 24.4 18.5 8.9

* Proportion of CNCR records missing data on clinical stage for objective reasons (early deaths, unfinished diagnosis, treatment not initiated due to contraindications, patient's refusal to treatment) or incorrect records.

List of abbreviations (*)

  • CNCR – Czech National Cancer Registry
  • CR – Czech Republic
  • HKK – Hradec Kralove Region
  • JHC – South Bohemian Region
  • JHM – South Moravian Region
  • KVK – Karlovy Vary Region
  • LBK – Liberec Region
  • MSK – Moravian-Silesian Region
  • OLK – Olomouc Region
  • PAK – Pardubice Region
  • PHA – Capital of Prague
  • PLK – Plzen Region
  • STC – Central Bohemian Region
  • ULK – Usti nad Labem Region
  • VYS – Vysocina Region
  • ZLK – Zlin Region

Last updated on 25 May 2018