Table 2: Association between Age and IOP.
A) Age Category and IOP Category.
| SN | Age Category | No. | < 12 mm Hg (n = 9) | 12 - 16 mm Hg (642) | 16-20 mmHg (n = 706) | 20 - 24 mmHg (n = 183) | > 24 mmHg (n = 60) | |||||
| No. | % | No. | % | No. | % | No. | % | No. | % | |||
| 1. | < 40 years | 84 | 0 | 0.0 | 29 | 34.5 | 33 | 39.3 | 20 | 23.8 | 2 | 2.4 |
| 2. | 41 - 60 years | 968 | 4 | 0.4 | 384 | 39.7 | 422 | 43.6 | 133 | 13.7 | 25 | 2.6 |
| 3. | > 60 years | 548 | 5 | 0.9 | 229 | 41.8 | 251 | 45.8 | 30 | 5.5 | 33 | 6.0 |
χ 2 = 48.235; p < 0.001.
B) Age Category and Mean IOP.
| SN | Age Category | No. of cases | IOP | |
| Mean | SD | |||
| 1. | < 40 years | 84 | 17.68 | 3.30 |
| 2. | 41 - 60 years | 968 | 16.92 | 3.22 |
| 3. | > 60 years | 548 | 16.98 | 3.65 |
F = 1.959; p = 0.141 (ANOVA).
C) IOP Category and Mean Age.
| SN | IOP Category | No. of cases | Age | |
| Mean | SD | |||
| 1. | < 12 mmHg | 9 | 61.56 | 7.54 |
| 2. | 12 - 16 mmHg | 642 | 58.50 | 9.73 |
| 3. | 16 - 20 mmHg | 706 | 56.77 | 9.61 |
| 4. | 20 - 24 mmHg | 183 | 53.17 | 9.26 |
| 5. | > 24 mmHg | 60 | 60.20 | 10.92 |
F = 13.125; p < 0.001.
D) Correlation (Pearson correlation).
| Variable | 'r' | 'p' |
| Age vs IOP | -0.075 | 0.003 |
There was a weak and inverse significant correlation between age and IOP (r = -0.075; p = 0.003).