Biometry, Refractive Errors, and the Results of Cataract Surgery: A Large Sample Study

Table 4

Segmentation by age of the biometric parameters, spherical equivalents (SE1 and SE2), and PE.

Age group	AL (mm) mean (sd)	LT (mm) mean (sd)	ACD (mm) mean (sd)	Kav (D) mean (sd)	SEpre (D) mean (sd)	SEpost (D) mean (sd)	PE (D) mean (sd)
≤40	24.61 (2.99)	3.87 (0.58)	3.39 (0.55)	44.17 (2.37)	−3.43 (8.54)	−0.44 (1.35)	0.13 (1.53)
41–60	23.95 (2.45)	4.31 (0.52)	3.18 (0.45)	43.83 (2.18)	−2.05 (6.11)	−0.37 (1.26)	0.32 (1.36)
61–79	23.44 (1.32)	4.58 (0.50)	3.00 (0.42)	44.08 (1.66)	−1.03 (3.56)	−0.33 (1.03)	0.28 (1.07)
≥80	23.28 (0.99)	4.73 (0.52)	2.85 (0.41)	44.13 (1.56)	0.06 (2.78)	−0.35 (1.18)	0.20 (1.77)
F	204.2 (1)	95.9 (1)	497.8 (1)	Table 5	392 (1)	No diff. (1)	Table 6

The results of the analysis of variance are reported using the F-value, with the actual power of the test in parentheses. The analysis of Kav and PE is particularized in Tables 5 and 6, respectively.