I think there are many parameters to concern especially the distance between the collection site and MOPH, also data privacy as well.
I would propose that if the distance is near then choosing the network that covers a smaller area would be safer for privacy data transferring than using the wider one (WAN) since we concerned that blood pressure(BP) is a sensitive information.
When collecting data the wearable device will transfer BP data to device near by (cell phone or laptop) using PAN.
– If the collection site is nearby the MOPH computer system we can use PAN. PAN it is easy for small area, safer for privacy since it only shared data with a small area but the cons is that all of the devices have to be very close to the MOPH system.
– If the collection site is within the MOPH building we can use LAN. It is easy and can transfer data in high speed. the disadvantage for this case is that clinical research don’t usually collect the data within a small area such as within an organization building.
– If the collection site is in the same city as MOPH, MAN would be the best choice. However, it may cost a lot for network maintenance such as the network connections.
– WAN (the internet) covers all areas which is easily to transfer from all study area to MOPH. However, this network may not fit in this case when concerning BP is a sensitive information that needs high privacy controls.
If it is not necessary I would say choose the smaller network first to control the privacy. Only choose WAN if the distance is really far that the others network cannot cover.