If persons in the untreated...group die at any time in the study interval, they are reported...In the treated group, however, deaths which occur before completion of the treatment are rejected from the data, since these patients do not then meet the criteria...of the term 'treated'. The longer it takes for completion of the treatment,...the worse the error.
Hardin B. JonesBeginning in 1940,...questionable grades of (low) malignancy were classed as cancer. ...the proportion of 'cancer' cures...increased rapidly.
Hardin B. JonesThe likelihood of treatment (of any one patient) increases with the length of time since the origin of the disease. ...Those cases in which the neoplastic process progresses slowly...are more likely to be transferred to the 'treated' category than to remain in the 'untreated'.
Hardin B. JonesIf persons in the untreated...group die at any time in the study interval, they are reported...In the treated group, however, deaths which occur before completion of the treatment are rejected from the data, since these patients do not then meet the criteria...of the term 'treated'. The longer it takes for completion of the treatment,...the worse the error.
Hardin B. Jones