I am conducting a comparison cohort study between the hysterectomy group and non-hysterectomy group among patients with placenta accreta spectrum. The main outcome is the health-related quality of life scores, using SF-36 questionnaire and one another obstetrics-specific HQoL scale. But I'm not sure about how to calculate the right sample size for the two groups. can anyone help me solve this situation?

Thank you a lot for reading and sharing

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