Sampling and Recruitment

The invitation-only design reduces bias from highly motivated volunteers and supports representative research. Substudy 1 will include 20 purposively sampled adult patients with cervical cancer from the two hospitals. Substudy 2 will include two to four focus group discussions with oncology-unit healthcare workers. The quantitative substudies will include 128 patients with cervical cancer and assume a medium standardised effect size. Excluding people with severe mental health needs may reduce generalisability and underestimate mental health burden. The panel is probability-based and invitation-only, so people cannot enrol themselves. Potential survey-recruited participants must report a long-term condition affecting daily activities and agree to future research contact. GP recruitment begins with a random national sample of GP practices from Nivel’s Registration of Established General Practitioners. People attending psychotherapy, visibly psychotic, suicidal or unfit to consent will be excluded. The daycare user sample supports treatment-on-treated analysis but may be biased if improved daycare quality changed daycare enrolment. Privacy regulations are followed during record scree…