Table 5.
Interpeduncular angle (IPA): Age group wise.
| Age Group in Yrs | Total count (980) | Mean (Degree) | SD | Percentiles |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 5% | 10% | 25% | 50% | 75% | 90% | 95% | ||||
| <1 year | 20 | 81.19 | 10.502 | 57.00 | 66.80 | 73.00 | 82.00 | 87.75 | 94.30 | 94.30 |
| 1–10 | 89 | 80.17 | 9.311 | 64.00 | 66.00 | 75.00 | 81.00 | 86.00 | 91.60 | 96.30 |
| 11–20 | 77 | 73.93 | 8.121 | 61.30 | 64.00 | 69.00 | 73.00 | 80.00 | 84.00 | 85.70 |
| 21–30 | 177 | 72.97 | 9.416 | 56.20 | 60.00 | 67.00 | 73.00 | 80.00 | 85.00 | 87.90 |
| 31–40 | 189 | 74.92 | 8.566 | 60.40 | 63.00 | 69.50 | 75.00 | 81.00 | 86.00 | 88.00 |
| 41–50 | 135 | 75.60 | 9.246 | 59.00 | 63.00 | 69.00 | 76.00 | 83.00 | 87.00 | 89.20 |
| 51–60 | 118 | 78.60 | 8.400 | 63.75 | 67.50 | 72.75 | 78.50 | 84.00 | 87.50 | 91.00 |
| 61–70 | 112 | 78.97 | 8.528 | 64.00 | 69.60 | 75.50 | 79.00 | 83.50 | 89.00 | 90.00 |
| 71–80 | 50 | 77.63 | 12.230 | 63.00 | 67.50 | 73.00 | 77.50 | 84.25 | 90.30 | 94.30 |
| 81–90 | 13 | 86.75 | 7.175 | 74.00 | 74.90 | 81.00 | 87.50 | 92.75 | 96.70 | 96.70 |