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Segmented data comparison about width of PSCs in two different positions.
| Section (cm) | Supine position | Kneeling seat position | ||
|---|---|---|---|---|
| Total number | Number (percentage) | Total number | Number (percentage) | |
| [0, 6.67] | 30 | 15 (50.0%) | 30 | 11 (36.7%) |
| [6.67,13.33] | 30 | 14 (46.7%) | 30 | 14 (46.7%) |
| [13.33, 20] | 30 | 1 (3.3%) | 30 | 5 (16.6%) |
