In the absence of standardized collection and coding of treatment data by a cancer registry or other data source, administrative data are the most available data sources for basic information related to receipt of treatment, particularly hospital-based treatment [ 8, 9].
ED and GF participated in the implementation of treatment, data collection, interpretation of results and drafting of the manuscript.
For the collection of treatment cost data, we extended the survey to an affiliated hospital of the Changzhi Medical College (prefecture-level, located in Changzhi City, the capital city of Changzhi Prefecture, which has a population of 3.16 million [ 21]).
We supplemented detailed pathology information from each lung cancer case needed to assess etiologic heterogeneity with collection of treatment and outcome data to learn about disease progression and efficacy of treatment.
Evaluation included assessment of all measurable lesions by imaging (radiographic, ultrasonic or magnetic resonance) techniques, laboratory tests (haematology, chemistry and urinalysis), physical examination and data collection of treatment-related toxicities.
Future studies with a more comprehensive collection of anemia diagnosis and treatment data are warranted to validate these hypotheses.
According to protocol collection of demographic, clinical and treatment data was done at inclusion and after 6 months, 2, 5 and 10 years follow up.
Systematic collection of data relating treatment details to late effects is needed, and great care is needed to obtain valid and generalisable results.
In Denmark, the Data Capture Program (DCP) was developed by a group of GPs with the aim of facilitating research by systematic collection of data on treatment results from general practice clinics.
