Table 4 Comparisons of variables among different sexes, age groups, and myopic severity groups of the patients with high myopia (N = 2206).

From: A 10-year retrospective study on the prevalence and biometric characteristics of high myopia in Chinese cataract surgery candidates

Groups

N

AL (mm)

Corneal power (D, mean ± SD)

CD (mm)

ACD (mm)

CA (D)

CA severity

median (range)

K1

K2

K

mean ± SD

mean ± SD

median (range)

Low (%)

Moderate (%)

High (%)

Sex

 Male

1036

28.15 (26.00, 37.12)

42.71±1.50

43.86±1.61

43.29±1.51

12.04±0.45

3.51±0.40

0.97 (0.00, 6.64)

36.1

58.1

5.8

 Female

1170

28.86 (26.00, 37.34)

43.60 ±1.57

44.88 ±1.73

44.25±1.60

11.78±0.46

3.40±0.38

1.06 (0.00, 7.48)

29.5

63.1

7.4

 P value

 

<0.001a, c

<0.001a

<0.001a

<0.001a

<0.001a

<0.001a

0.001a, c

0.001b

0.018b

0.125b

Age (years)

 ≤39

122

28.28 (26.02, 37.34)

42.46±1.68

43.89±1.95

43.17±1.76

12.04±0.50

3.51±0.42

1.25 (0.00, 5.68)

26.2

62.3

11.5

 40–49

401

28.41 (26.00, 37.00)

42.68±1.57

43.81±1.74

43.24±1.61

12.04±0.43

3.55±0.37

0.97 (0.00, 4.39)

35.4

58.6

6

 50–59

541

29.10 (26.00, 37.12)

43.20±1.44

44.26±1.58

43.73±1.47

11.96±0.43

3.48±0.39

0.91 (0.00, 6.64)

39.4

56.7

3.9

 60–69

631

28.76 (26.01, 37.22)

43.52±1.60

44.68±1.73

44.10±1.62

11.82±0.48

3.43±0.40

1.01 (0.00, 6.96)

31.9

63.4

4.7

 70–79

395

28.14 (26.00, 35.09)

43.40±1.64

44.75±1.76

44.08±1.64

11.81±0.50

3.39±0.36

1.12 (0.00, 7.07)

26.8

63.1

10.1

 ≥80

116

27.12 (26.03, 35.16)

43.26±1.58

44.86±1.70

44.06±1.55

11.75±0.44

3.28±0.40

1.45 (0.00, 7.48)

21.6

62.9

15.5

 P value

 

<0.001* a, c

<0.001* a

<0.001* a

<0.001* a

<0.001* a

<0.001* a

<0.001* a, c

<0.001** b

0.187** b

<0.001** b

Myopic severity

 Mild

950

26.74 (26.00, 27.99)

43.08±1.58

44.22±1.77

43.65±1.62

11.94±0.47

3.48±0.38

0.95 (0.00, 6.96)

36.7

57.2

6.1

 Moderate

513

28.90 (28.00, 29.99)

43.28±1.65

44.55±1.84

43.92±1.69

11.86±0.48

3.50±0.38

1.08 (0.00, 7.48)

30.0

62.4

7.6

 Extremely

743

31.84 (30.00, 37.34)

43.28±1.58

44.52±1.65

43.90±1.57

11.89±0.48

3.39±0.40

1.08 (0.00, 6.64)

29.1

64.2

6.7

 P value

 

<0.001* a, c

0.013* a

<0.001* a

0.001* a

0.002* a

<0.001* a

0.010* a, c

0.001** b

0.009** b

0.547** b

  1. AL axial length, D diopters, SD standard deviation, K1 flat keratometry, K2 steep keratometry, K keratometry, CD corneal diameter, ACD anterior chamber depth, CA corneal astigmatism. *Trend analysis between different variables and age groups, myopic severity groups was performed using the Jonckheere–Terpstra test.
  2. **Trend analysis between the percentages of three astigmatism severities and age groups, myopic severity groups was performed by linear regression models.
  3. a,cMann–Whitney U test; aindependent t test; bχ2 test; * a,cKruskal–Wallis test; * aone–way ANOVA; ** bχ2 test.
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