. 2019 Jan 16;2019(1):CD011204. doi: 10.1002/14651858.CD011204.pub2

8. Methods for measuring [Na+] in included studies.

Study ID	Serum [Na+]	Dialysate [Na+]
Akdag 2015	Not reported	Not reported
Beduschi 2013	Reflectance spectrophotometry^a	Dialysate conductivity^a
Boquin 1977	Not reported	Not reported
Chambers 2002	Not reported	Not reported
Daugirdas 1985	Flame photometry^b	Flame photometry^b
Henrich 1982	Flame photometry	Flame photometry
Liu 2016	Ion selective electrode	Dialysate conductivity
MATCH‐NA 2015	Ion selective electrode^c	Dialysate conductivity^c
Ogden 1978	Flame photometry	Dialysate conductivity
Suckling 2013	Ion selective electrode	Ion selective electrode
Van Kuijk 1996	Ion selective electrode	Dialysate conductivity
Quereda 1988	Not reported	Not reported

^aPersonal communication Pasqual Barretti 18 July 2018

^bPersonal communication John T Daugirdas 17 July 2018

^cPersonal communication Jula Inrig 17 July 2018