Statistical analyses current paper
In the current paper, we compared the participants and non-participants
by sex, age at diagnosis, type of cancer, attained age (age at
invitation), follow-up time since childhood cancer diagnosis until
invitation, and for cancer treatment (dichotomous variables for any
chemotherapy, any radiotherapy, any surgery and categorical variable for
bone marrow/stem cell transplant [no, autologous, allogenic,
unknown]). Treatment variables represent cumulative exposures
accumulated during treatment for primary tumor, metastases and
recurrences, regardless of time since first diagnosis, and captured from
original medical files in the treatment centers (e.g. Teepen et al.
submitted). Differences in the distributions were tested using a Chi
square test.