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Table 2 Visual and refractive outcomes in both treatment groups

From: Q-value customized versus wavefront-optimized ablation in femtosecond laser-assisted LASIK for myopia and myopic astigmatism: a prospective contralateral comparative study

Parameter

Ablation profile groups

Mean ± SE 95% CI (LB, UB)

P value b

Custom-Q profile (n = 40)

WFO profile (n = 40)

UDVA (logMAR)

Preoperative

1.30 ± 0.03 (1.23, 1.36)

1.10 ± 0.05 (1.00, 1.20)

0.009

Postoperative

0.40 ± 0.04 (0.28, 0.46)

0.20 ± 0.04 (0.14, 0.30)

0.007

Difference

0.90 ± 0.04 (0.86, 1.00)

0.90 ± 0.04 (0.84, 1.00)

0.819

P valuea

< 0.001

< 0.001

 

CDVA (logMAR)

Preoperative

0.28 ± 0.03 (0.22, 0.35)

0.17 ± 0.03 (0.10, 0.20)

0.010

Postoperative

0.28 ± 0.03 (0.22, 0.35)

0.18 ± 0.03 (0.10, 0.20)

0.014

Difference

0.000 ± 0.006 (− 0.010, 0.010)

 − 0.008 ± 0.004 (− 0.020, 0.001)

0.417

P valuea

1.000

0.083

 

Optical zone

 

6.20 ± 0.04 (6.16, 6.32)

6.40 ± 0.03 (6.32, 6.46)

0.006

Sphere (D)

Preoperative

 − 6.20 ± 0.48 (− 7.15, − 5.23)

 − 4.10 ± 0.40 (− 4.90, − 3.30)

0.001

Postoperative

 − 0.50 ± 0.09 (− 0.60, − 0.30)

 − 0.10 ± 0.05 (− 0.20, 0.01)

0.001

Difference

5.70 ± 0.40 (4.90, 6.60)

4.00 ± 0.40 (3.20, 4.80)

0.003

P valuea

< 0.001

< 0.001

 

Cylinder (D)

Preoperative

 − 1.70 ± 0.20 (− 2.10, − 1.30)

 − 1.50 ± 0.20 (− 1.90, − 1.10)

0.489

Postoperative

 − 0.30 ± 0.07 (− 0.45, − 0.18)

 − 0.20 ± 0.05 (− 0.30, − 0.10)

0.274

Difference

1.40 ± 0.19 (0.98, 1.70)

1.30 ± 0.17 (0.90, 1.60)

0.892

P valuea

< 0.001

< 0.001

 

MRSE (D)

Preoperative

 − 7.00 ± 0.48 (− 8.00, − 6.10)

 − 4.90 ± 0.40 (− 5.70, − 4.00)

0.001

Postoperative

 − 0.60 ± 0.10 (− 0.80, − 0.40)

 − 0.20 ± 0.06 (− 0.32, − 0.08)

0.001

Difference

6.40 ± 0.40 (5.60, 7.20)

4.70 ± 0.40 (3.90, 5.40)

0.002

P valuea

< 0.001

< 0.001

 
  1. UDVA = uncorrected distance visual acuity; CDVA = corrected distance visual acuity; logMAR = logarithms of minimum angle of resolution; MRSE = manifest refraction spherical equivalent; WFO = wavefront-optimized. P values in bold indicate statistical significance
  2. aP value of change between pre- and postoperative values (intra-group)
  3. bP value of difference between custom-Q and WFO groups (inter-group)