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| Echogenicity Grades [Grading based on ultrasound features] | Parenchymal Thickness (cm) | ||||||
| No. of Patients | Mean | SD | 95% Confidence Interval for Mean | F Value | P-Value | ||
| Lower Bound | Upper Bound | ||||||
| Grade 0 | 60 | 4.397 | 0.101 | 4.371 | 4.423 | 31.628 | 0.0005 |
| Grade 1 | 60 | 4.582 | 0.905 | 4.348 | 4.816 | ||
| Grade 2 | 44 | 5.048 | 0.920 | 4.768 | 5.328 | ||
| Grade 3 | 24 | 4.433 | 0.481 | 4.230 | 4.637 | ||
| Grade 4 | 12 | 5.933 | 1.029 | 5.280 | 6.587 | ||
| Total | 200 | 4.692 | 0.820 | 4.578 | 4.806 | ||
