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Table 3 Characteristics of Subjects with and without High Axial Myopia (Student’s t Test and Pearson’s χ2 Test)

From: Associations between anterior segment biometry and high axial myopia in 3438 cataractous eyes in the Chinese population

Characteristics

AL (Group) a

P Value

Non-Highly Axial Myopia (n = 773)

Highly Axial Myopia (n = 2665)

Age (years)

773 (64.6 ± 10.9) b

2665 (61.5 ± 10.4)

<  0.001

AL (mm)

773 (25.12 ± 1.29)

2665 (29.54 ± 2.19)

< 0.001

Q Value

646 (−0.16 ± 0.18)

2226 (− 0.20 ± 0.18)

< 0.001

TCRP (D)

 Flat Meridian

679 (43.05 ± 1.26)

2378 (42.77 ± 1.25)

< 0.001

 Steep Meridian

679 (44.04 ± 1.31)

2378 (43.87 ± 1.34)

0.003

 Mean Value

679 (43.56 ± 1.24)

2378 (43.34 ± 1.25)

< 0.001

CA (D)

679 (0.99 ± 0.66)

2378 (1.09 ± 0.70)

0.001

Degree of CA

  < 1.5 D

541 (79.7)

1781 (74.9)

0.01

  ≥ 1.5 D c

138 (20.3)

597 (25.1)

 

Axis of CA

  

0.43

 WTR

276 (40.7)

1028 (43.3)

 

 ATR

270 (39.8)

886 (37.3)

 

 OB

132 (19.5)

462 (19.4)

 

WTW (mm)

529 (11.38 ± 0.39)

1932 (11.43 ± 0.43)

0.03

CT (μm)

 Central

650 (538.4 ± 31.4)

2228 (541.5 ± 32.9)

0.04

 Temporal

649 (656.7 ± 41.9)

2219 (669.7 ± 46.3)

< 0.001

 Nasal

608 (696.8 ± 44.6)

2152 (688.5 ± 46.8)

<  0.001

ACD (mm)

657 (2.72 ± 0.47)

2278 (2.96 ± 0.49)

<  0.001

IOP (mmHg)

666 (14.8 ± 3.1)

2323 (15.4 ± 3.4)

<  0.001

Scale of IOP

  

0.001

  < 21 mmHg

651 (97.7)

2196 (94.5)

 

  ≥ 21 mmHg d

15 (2.3)

127 (5.5)

 
  1. Abbreviations: ACD Anterior chamber depth, AL Axial length, ATR Against-the-rule astigmatism, CA Corneal astigmatism, CT Corneal thickness, D Diopter, IOP Intraocular pressure, OB Oblique astigmatism, Q Corneal asphericity coefficient, TCRP Total corneal refractive power, WTR With-the-rule astigmatism, WTW White-to-white corneal diameter
  2. aThe division of AL subgroups: non-highly axial myopia, 21.50 ≤ AL < 26.5 mm; highly axial myopia, AL ≥26.50 mm
  3. bFor quantitative variables, the values are expressed as the number of eyes (mean ± standard deviation); for qualitative variables, the values are expressed as the number of eyes (proportion)
  4. cIndication for toric intraocular lens implantation during cataract surgery
  5. dOcular hypertension
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BMC Ophthalmology

ISSN: 1471-2415

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