Statistical methods
cancer
REGRESSION, CANCER, DISEASE
First, selection effects were investigated by comparing participating and non-participating patients in the supplementary survey. To examine the selection bias, chi-square tests and F-tests were performed (independent variable: patient included versus excluded, depended variables: age, sex, etc.). Next, we compared the both groups of survey participants (not affected, A, and affected, B, by lockdown with regard to PIKKO) regarding to socio-demographic data, disease data, and treatment as well, using chi-square tests and F-tests.Then we compared both groups (not affected, A, and affected, B, by lockdown with regard to PIKKO) regarding health care related variables.To examine the restrictions in relation to the disease we conducted chi-square tests.To quantify the burden due to the pandemic containment strategies, we applied first a linear regression. All single items of the COVID-19 CBS and the sum score of the CBS (in separate calculations) were used as dependent variables. As independent variables we considered Group (0: not affacted, 1: affected), age (grouped by median, 0: under 60 years, 1: 60 + years), gender (0: female, 1: male), children in the household (0: no, 1: yes), financial burden (0: no, 1: yes), period of the most recent illness (dummy variable A: up to 1 year versus 6 + years, dummy variable B: 2–5 years versus 6 + years) and cancer treatment at baseline (dummy variable A: active treatment versus no active treatment, dummy variable B: only rehabilitation versus no active treatment). Based on the estimated regression coefficients we estimated adjusted group means and compared them with t-tests.The assumption of an influence on the course of the disease and using of parts of the PIKKO intervention during the lockdown was investigated with chi-square tests.Cramer-V [Missing values did not occur in the dichotomous questions. Missing answers in the CBS that occurred when an item/situation did not apply to the patient were marked as “not applicable” were included in the calculation of the CBS score as “8 - Sum(Missing)”. Only if all subitems were “not applicable”, these cases were excluded from the CBS analysis.In all analyses, the level of significance was α = 0.05.Data on the utilization of the PIKKO modules (Patient Navigator, SCS counseling and courses, knowledge database) were analyzed descriptively.