Sampling and Sample Size
PD
REGRESSION, SETTLE, RECRUITMENT
The RCT aimed to examine the effects of telehealth service on health outcomes and enrolled 338 patients who were undergoing CAPD for at least 3 months to ensure adequate experience and time to settle into this treatment. Before recruitment to the RCT study, a statistician created a table of random numbers by using computer-generated sequences. The sample was conveniently selected with the eligible criteria. Interested patients were screened for eligibility by PD nurses. Following informed consent, the participants completed a demographic form and baseline questionnaires. Subsequently, participants were randomly allocated to either the intervention or the control group using sealed envelopes containing nonduplicated numbers (1-338). All 338 participants were randomly assigned into 2 groups for 12 months: the intervention group (telehealth service plus standard care; n=169) and the control group (standard care only; n=169). RCT outcomes were evaluated at baseline, 4 months, and 12 months. As part of the RCT study, all eligible participants who were randomly assigned to the intervention group for receiving telehealth service plus standard care for 4 months were conveniently included in this study. Based on the eligibility criteria, a total of 159 participants were recruited in this study. Although the formal sample size for this study was not calculated, a minimum sample size of 158 was required based on the power analysis for multiple regression with a power of 0.80, a significance level (α) of .05 (