Table 4: Association between BMI and IOP.
(a) BMI and IOP Category.
| SN | BMI (kg/m2) | 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. | Underweight (< 18.5) | 30 | 0 | 0.0 | 20 | 66.7 | 0 | 0.0 | 10 | 33.3 | 0 | 0.0 |
| 2. | Normal (18.5-24.9) | 944 | 6 | 0.6 | 386 | 40.9 | 441 | 46.7 | 99 | 10.5 | 12 | 1.3 |
| 3. | Overweight (25.0 - 29.9) | 496 | 3 | 0.6 | 198 | 39.9 | 203 | 40.9 | 62 | 12.5 | 30 | 6.0 |
| 4. | Obese (≥ 30) | 130 | 0 | 0.0 | 38 | 29.2 | 62 | 47.7 | 12 | 9.2 | 18 | 13.8 |
χ2 = 99.74; p < 0.001 (Chi-square test).
(b) BMI and Mean IOP.
| SN | BMI (kg/m2) | No. of cases | IOP | |
| Mean | SD | |||
| 1. | Underweight (< 18.5) | 30 | 16.60 | 2.88 |
| 2. | Normal (18.5 - 24.9) | 944 | 16.61 | 2.89 |
| 3. | Overweight (25.0 - 29.9) | 496 | 17.29 | 3.67 |
| 4. | Obese (≥ 30) | 130 | 18.53 | 4.82 |
F = 14.75; p < 0.001 (ANOVA).
(c) C) IOP and Mean BMI.
| SN | IOP Category | No. of cases | BMI | |
| Mean | SD | |||
| 1. | < 12 mmHg | 9 | 23.89 | 2.10 |
| 2. | 12 - 16 mmHg | 642 | 24.12 | 3.30 |
| 3. | 16 - 20 mmHg | 706 | 24.74 | 3.51 |
| 4. | 20 - 24 mmHg | 183 | 24.33 | 3.89 |
| 5. | > 24 mmHg | 60 | 27.90 | 4.02 |
F = 33.86; p < 0.001 (ANOVA).
(d) Correlation (Pearson correlation).
| Variable | R | 'p' |
| BMI vs. IOP | 0.173 | < 0.001 |