[Breast cancer centres in North Rhine-Westphalia - case volume trends 2004-2010].
BACKGROUND
To improve quality of breast cancer care, in 2004 the state of North Rhine-Westphalia (NRW), Germany, began to appoint 51 breast cancer centres. These centres comprise 91 hospitals performing breast cancer surgery which have - amongst other things - to fulfill minimum volume standards. The aim of our study was to analyse if the intended regionalisation of care from 252 hospitals performing breast cancer surgery formerly to the appointed hospitals had taken place by the year 2010.


METHODS
We used data for the years 2004-2010 from the agency for quality assurance in North Rhine-Westphalia concerning breast cancer care and analysed trends concerning the number of hospitals performing breast cancer surgery, case volumes, and achievement of minimum volume standards by performing descriptive and inferential statistics.


RESULTS
Between 2004 and 2010 the number of breast cancer cases increased by 36.6% from 12 975 to 17 724 cases (p<0.001, Wilcoxon test). Simultaneously, the number of hospitals performing breast cancer surgery decreased from 252 to 208 whereby more than double the number of planned hospitals still performed breast cancer surgery. The case volumes of the 71 appointed hospitals for which we had individual data over the entire period of time increased by 49.4% from 8 103 cases in year 2004 to 12 105 cases in 2010. Assuming that case volume trends of those 20 appointed hospitals of which we did not have individual data developed uniformly to all other appointed hospitals, the proportion of cases that were operated in not appointed hospitals decreased from 20% in year 2004 to 12.5% in 2010 (p<0.001, χ2 test). Simultaneously, the proportion of cases that were operated in hospitals not achieving minimum volume standards decreased from 42.7% in year 2004 to 12.1% in 2010 (p<0.001, χ2 test).


CONCLUSIONS
The establishment of breast cancer centres in NRW regionalised breast cancer surgery. In fact, in 2010 breast cancer surgery still took place in more than 100 not appointed hospitals. However, these hospitals were responsible for only a small proportion of breast cancer surgery.
Institut für Gesundheitssystemforschung, Universität Witten/Herdecke, Witten. max.geraedts@uni-wh.de
M
M
Geraedts
M
M
Malik
O
O
Jung
W
W
de Cruppé
D001943:Breast Neoplasms / Q000175:diagnosis / Q000453:epidemiology* / Q000601:surgery*; D005260:Female; D005858:Germany / Q000453:epidemiology; D006761:Hospitals / Q000706:statistics & numerical data* / Q000639:trends; D006801:Humans; D008408:Mastectomy / Q000706:statistics & numerical data*; D016522:Oncology Service, Hospital / Q000706:statistics & numerical data* / Q000639:trends; D015995:Prevalence; D012307:Risk Factors; D014600:Utilization Review; D016526:Workload / Q000706:statistics & numerical data*