| Variable | Group 1 (n = 12) | Group 2 (n = 28) | Group 3 (n = 48) | F | P value | L.S.D. |
| pre IVC (cm) | ||||||
| Mean ± SD Range | 2.16 ± 0.14 2.0 - 2.4 | 1.83 ± 0.12 1.6 - 2.0 | 1.81 ± 0.08 1.6 - 1.9 | 56.328 | 0.000** | P1 = 0.000** P2 = 0.000** P3 = 0.416 |
| Post IVC (cm) | ||||||
| Mean ± SD Range | 1.78 ± 0.08 1.7 - 1.9 | 1.15 ± 0.09 1.0 - 1.3 | 1.47 ± 0.08 1.3 - 1.6 | 282.019 | 0.000** | P1 = 0.000** P2 = 0.000** P3 = 0.000** |
| IVC change (cm) |
| |||||
| Mean ± SD Range | 0.38 ± 0.84 0.3 - 0.5 | 0.68 ± 0.08 0.5 - 0.8 | 0.34 ± 0.08 0.2 - 0.5 | 154.233 | 0.000** | P1 = 0.000** P2 = 0.076 P3 = 0.000** |