What are the "normal" ranges for a systolic/diastolic blood pressure measurement?
How large would a unit change in a blood pressure measurement from one hour to the next have to be to be considered unsual?
How many time passes between two consecutive dialysis sessions?
Do blood pressures change with age/sex/height etc?
What is the expected rate of hypotension for patients using dialysis?
How to define "hypotension" under both conditions?
Do you expect their to be any measurement error in your devices? If so, how much would you suspect?
Do you expect the baseline blood pressures of patients to change from session to session due to treatment and/or time of year?
As cross-over study method is applied, do we need to use difference in difference to do analysis?