Nomenclature, categorization and usage of formulae to adjust QT interval for heart rate

Table 1 QT correction equations

Ref.	Sample size	Population characteristics	Nomenclature
Linear function
Sagie et al (1992) (Framingham)[26]	5018	Men (2239) and women (2779), aged 28 to 62 yr	QTcFRM
Rational functions
Hodges et al (1983)[31]	607	Men (303) and women (304), aged 20 to 89 yr	QTcHDG
Rautaharju et al (2014)[17]	57595	Men and women, aged 5 to 90 yr	QTcRTHa
Power functions
Bazett (1920)[8]	39	Men (20) and women (19), aged 14 to 53 yr	QTcBTZ
Fridericia (1920)[9]	50	Men and women, aged 30 to 81 yr	QTcFRD
Mayeda (1934)[24]	200	Men (135) and women (65), aged 18 to 64 yr	QTcMYD
Kawataki et al (1984)[32]	9	9 male subjects aged 18 to 71 yr, taken at rest, during exercise, and after drug administration	QTcKWT
Dmitrienko et al (2005)[16]	13039	Men (6351) and women (6688), aged 4 to 99 yr	QTcDMT
Goto et al (2008)[25]	1276	Men aged 20 to 35 yr	QTcGOT
Rautaharju et al (2014)[17]	57595	Men and women, aged 5 to 90 yr	QTcRTHb