Table 2. Mean absolute predicted error by five formulas.

Formula	MAE (D)
	AL≤22mm (n = 41)	22<AL≤24.5mm (n = 45)	AL>24.5mm (n = 26)	entire AL(n = 112)
SRK/T	0.47	0.46	0.78	0.54
Haigis	0.77	0.51	0.51	0.61
Hoffer Q	0.51	0.45	0.76	0.54
Holladay	0.47	0.41	0.68	0.49
Barrett	0.48	0.41	0.35	0.42
P value	0.024*	0.608	0.012*	0.037*

AL = axial length; MAE = Mean absolute error; Barrett = Barrett Universal II; *indicates P<0.05.