Corneal layer and zone

Age group

60-69

70-79

80-89

Diabetic group

Control group

P

Diabetic group

Control group

P

Diabetic group

Control group

P

Anterior

0-2 mm

15.122 ± 1.380

14.628 ± 1.005

0.012^b

15.492 ± 1.458

15.141 ± 1.205

0.051^b

16.919 ± 2.477

15.928 ± 2.029

0.001^b

2-6 mm

14.364 ± 1.219

14.274 ± 1.260

0.527^b

15.864 ± 2.123

15.085 ± 1.776

0.003^b

17.364 ± 2.540

16.286 ± 2.391

0.001^b

6-10 mm

22.717 ± 5.718

24.065 ± 7.500

0.318^b

30.208 ± 8.773

28.627 ± 7.439

0.176^a

34.573 ± 7.191

33.349 ± 8.362

0.386^b

10-12 mm

34.522 ± 12.696

34.838 ± 11.589

0.619^b

40.667 ± 12.898

40.232 ± 13.039

0.840 ^b

44.316 ± 12.264

41.704 ± 12.743

0.135^b

Total

20.207 ± 3.256

20.658 ± 4.003

0.587^b

24.060 ± 4.710

23.025 ± 3.854

0.227 ^b

26.861 ± 4.321

25.424 ± 4.805

0.059^a

Central

0-2 mm

9.829 ± 0.677

9.798 ± 0.649

0.622^b

10.139 ± 0.917

10.055 ± 0.912

0.358 ^b

11.280 ± 1.929

10.423 ± 1.086

0.000^b

2-6 mm

9.493 ± 0.703

9.628 ± 0.971

0.761^b

10.623 ± 1.519

10.123 ± 1.251

0.014^b

11.521 ± 1.676

10.900 ± 1.593

0.005^b

6-10 mm

16.088 ± 3.764

16.912 ± 4.765

0.355^b

21.211 ± 5.605

19.969 ± 4.594

0.092^a

23.791 ± 4.956

22.829 ± 5.654

0.329^b

10-12 mm

19.928 ± 5.073

19.964 ± 5.134

0.960^b

23.054 ± 6.161

23.278 ± 5.939

0.681^b

25.434 ± 6.088

23.212 ± 7.149

0.011^b

Total

13.289 ± 1.895

13.644 ± 2.386

0.459^b

15.871 ± 2.955

15.238 ± 2.227

0.255^b

17.579 ± 2.726

16.549 ± 3.073

0.033^a

Posterior

0-2 mm

10.078 ± 0.852

9.990 ± 0.758

0.871^b

10.399 ± 0.973

10.405 ± 1.139

0.606^b

11.700 ± 1.677

11.118 ± 1.309

0.028^b

2-6 mm

9.801 ± 0.985

9.845 ± 1.017

0.858^b

10.831 ± 1.381

10.456 ± 1.439

0.026^b

11.823 ± 1.748

11.491 ± 1.655

0.209^b

6-10 mm

15.344 ± 2.657

15.650 ± 3.187

0.765^b

18.793 ± 3.277

17.971 ± 3.045

0.073^a

20.359 ± 3.171

19.751 ± 3.614

0.278^a

10-12 mm

16.903 ± 2.798

17.114 ± 2.679

0.553^a

19.289 ± 3.090

19.225 ± 3.041

0.854^b

20.669 ± 3.700

19.392 ± 3.785

0.032^b

Total

12.771 ± 1.472

12.902 ± 1.686

0.985^b

14.643 ± 1.871

14.186 ± 1.668

0.144^b

15.917 ± 1.799

15.309 ± 2.116

0.107^b

Total

0-2 mm

11.682 ± 0.833

11.466 ± 0.689

0.164^b

12.001 ± 0.996

11.865 ± 0.981

0.219^b

13.300 ± 1.907

12.491 ± 1.298

0.001^b

2-6 mm

11.224 ± 0.885

11.251 ± 1.026

0.746^b

12.437 ± 1.606

11.888 ± 1.417

0.008^b

13.567 ± 1.908

12.894 ± 1.768

0.011^b

6-10 mm

18.050 ± 3.912

18.879 ± 5.011

0.435^b

23.402 ± 5.712

22.187 ± 4.784

0.109^a

26.244 ± 4.898

25.313 ± 5.727

0.288^a

10-12 mm

23.697 ± 6.252

23.966 ± 5.997

0.711^b

27.666 ± 6.788

27.580 ± 6.706

0.981^b

30.141 ± 6.411

28.099 ± 7.287

0.027^b

Total

15.422 ± 2.107

15.739 ± 2.607

0.617^b

18.186 ± 3.066

17.477 ± 2.422

0.198^b

20.120 ± 2.797

19.094 ± 3.219

0.041^a