Attractive features include the high rate of participation between examination cycles and free access to standardised medical care and evaluation.
Any woman with a malignant histology result, or with clinical symptoms and signs that strongly indicate a malignant disease will either be excluded from study participation upon examination, or excluded as soon as the histology report is presented (usually within a week).
[ 67] According to the DLHR indirect participation includes examinations to declare an individual "fit" for caning, shackles, solitary confinement or any other type of abuse, and dietary restrictions.
All study participants gave their informed written consent before participation in the examination, and the study protocol was approved by the National Center for Health Statistics.
Analyses were repeated with weighting by the inverse of the probability of participation in the examination, thereby giving more weight to participants who resemble nonparticipants (28).
Because understanding and participation during clinical examination are necessary, children younger than 3 years of age are excluded, like in this study.
Participation in the examination is voluntary.
Briefly, of all residents aged 40 years or over, 3,328 underwent the examination (participation rate, 77.6%).
Prior to participation in the examination, parents were informed about the aims of the study, received a full description of the procedure, and provided written consent.
