Average PEFR (Equation 1 and PEFR) L/min
r = –0.63 p = <0.001
(a)

Average PEFR (Equation 2 and measured) L/min
r = –0.65 p = <0.001
(b)

Average PEFR (Equation 3 and measured) L/min
r = –0.61 p = <0.001
(c)

Average PEFR (Equation 4 and measured) L/min
r = –0.59 p = <0.001
(d)

Average PEFR (Equation 9 and PEFR) L/min
r = –0.28 p = 0.033
(g)

Average PEFR (Equation 10 and PEFR) L/min
r = –0.42 p = <0.001
(h)

Average PEFR (Equation 11 and PEFR) L/min
r = –0.39 p = 0.002
(i)

Average PEFR (Equation 12 and PEFR) L/min
r = –0.10 p = 0.447
(j)

Average PEFR (Equation 13 and PEFR) L/min
r = –0.33 p = 0.011
(k)

Average PEFR (Equation 14 and PEFR) L/min
r = –0.44 p = <0.001
(l)

Average PEFR (Equation 15 and PEFR) L/min
r = –0.07 p = 0.590
(m)

Average PEFR (Equation 16 and PEFR) L/min
r = –0.60 p = <0.001
(n)

Average PEFR (Equation 17 and PEFR) L/min
r = –0.03 p = 0.799
(o)

Average PEFR (Equation 18 and PEFR) L/min
r = +0.20 p = 0.119
(p)

Fig. 2. Bland-Altman plots for difference against mean PEFR in girls.