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Table 2 Characteristics of subjects in axial length subgroups (One-Way Analysis of Variance 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 Valuee

Normal (n = 238)

Medium-long (n = 535)

Long (n = 2665)

Age (years)

238 (66.2 ± 9.8) b

535 (63.9 ± 11.3) **

2665 (61.5 ± 10.4) ***

<  0.001

AL (mm)

238 (23.37 ± 0.64)

535 (25.90 ± 0.51) ***

2665 (29.54 ± 2.19) ***

<  0.001

Q Value

195 (−0.14 ± 0.21)

451 (− 0.17 ± 0.16) *

2226 (− 0.20 ± 0.18) ***

<  0.001

TCRP (D)

 Flat Meridian

203 (43.35 ± 1.19)

476 (42.92 ± 1.27) ***

2378 (42.77 ± 1.25) ***

<  0.001

 Steep Meridian

203 (44.33 ± 1.18)

476 (43.91 ± 1.34) ***

2378 (43.87 ± 1.34) ***

<  0.001

 Mean Value

203 (43.87 ± 1.14)

476 (43.44 ± 1.26) ***

2378 (43.34 ± 1.25) ***

<  0.001

CA (D)

203 (0.98 ± 0.65)

476 (1.00 ± 0.67)

2378 (1.09 ± 0.70) *

0.005

Degree of CA

  < 1.5 D

163 (80.3)

378 (79.4)

1781 (74.9)

0.04

  ≥ 1.5 D c

40 (19.7)

98 (20.6)

597 (25.1)

 

Axis of CA

   

0.18

 WTR

73 (36.0)

203 (42.7)

1028 (43.3)

 

 ATR

93 (45.8)

177 (37.3)

886 (37.3)

 

 OB

37 (18.2)

95 (20.0)

462 (19.4)

 

WTW (mm)

150 (11.25 ± 0.36)

379 (11.43 ± 0.40) ***

1932 (11.43 ± 0.43) ***

< 0.001

CT (μm)

 Central

197 (532.4 ± 30.6)

453 (541.1 ± 31.4) **

2228 (541.5 ± 32.9) ***

0.001

 Temporal

196 (645.9 ± 38.5)

453 (661.4 ± 42.4) ***

2219 (669.7 ± 46.3) ***

< 0.001

 Nasal

182 (696.0 ± 45.6)

426 (697.1 ± 44.2)

2152 (688.5 ± 46.8) *

0.001

ACD (mm)

197 (2.52 ± 0.42)

460 (2.80 ± 0.46) ***

2278 (2.96 ± 0.49) ***

<  0.001

IOP (mmHg)

217 (14.7 ± 3.0)

449 (14.8 ± 3.2)

2323 (15.4 ± 3.4) **

< 0.001

Scale of IOP

   

0.002

  < 21 mmHg

214 (98.6)

437 (97.3)

2196 (94.5) **

 

  ≥ 21 mmHg d

3 (1.4)

12 (2.7)

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. *P < 0.05, **P < 0.01, and ***P < 0.001 (two-tailed). The P values were from post hoc comparisons with the normal subgroup
  3. aThe division of AL subgroups: normal, 21.50 ≤ AL < 24.50 mm; medium-long, 24.50 ≤ AL < 26.50 mm; long, AL ≥26.50 mm
  4. 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)
  5. cIndication for toric intraocular lens implantation during cataract surgery
  6. dOcular hypertension
  7. eThe P values were from one-way analysis of variance and Pearson’s χ2 test
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BMC Ophthalmology

ISSN: 1471-2415

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