Patients who have moved countries or clinical centres may not remember the exact date of starting ART or choose not to share information about previous therapy with their current health care provider.
We did a sensitivity analysis to examine the effect of excluding covariates that might change over time (Karnofsky score, ECOG score, McGill Quality of Life scales, treatment preferences, and terminal illness awareness), as the exact date of starting palliative chemotherapy was not ascertained during the baseline assessment.
However, because these studies started in 1973, several relevant study objectives were not available, i.e., exact dates of first diagnosis, operation, initial and follow up-data assessments and matching, socio-economic status, social support, spirituality etc.
To minimize misclassification of the famine exposure periods, subjects who were born between 1 October 1958 and 30 September 1959 or between 1 October 1961 and 30 September 1962 were excluded since the exact dates of the start and the end of the Chinese famine were not available and not the same across regions.
Information on migration contains the exact date of immigration to Sweden starting in 1973.
To start with, the exact date of the establishment of the Greek state is disputed.
It gets more confusing: to start with, the exact date of the establishment of the Greek state is disputed.
Because most patients are diagnosed with cancer in secondary care, the exact date of diagnosis is not always recorded appropriately in the EMR of the GP, neither is the date of the end (or start) of treatment.
Exact date of replacement?
