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Table 1 Distribution of study subjects by residency year and mean performance rating scores

From: Phantom model and scoring system to assess ability in ultrasound-guided chest drain positioning

Year N (%) PRS (SD) Group N (%) PRS (SD)
1 4 (12.9) −1.25 (2.5) Novice 20 (64.5) 0.75 (4.38)
2 8 (25.8) 0.00 (2.67)
3 8 (25.8) 2.50 (5.98)
4 5 (16.1) 6.00 (4.18) Expert 11 (35.5) 5.91 (3.75)
5 6 (19.4) 5.83 (3.76)
Total 31 (100) p = 0.025   31 (100) p = 0.0026