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Table 2 Mean score improvement (with 95% confidence interval) and p-value, per group, per OSATS category. CI = confidence interval. OSATS = objective structure assessment of technical skills

From: Self-directed learning by video as a means to improve technical skills in surgery residents: a randomized controlled trial

 

Control Group

 

Intervention Group

 

OSATS category

Mean [95% CI]

P value

Mean [95% CI]

P value

Respect of tissues

0.9 [0.2, 1.5]

P = 0.008

1.2 [0.5, 1.8]

P = 0.0005

Time and Motion

0.6 [0.1, 1.2]

P = 0.02

0.7 [0.2, 1.2]

P = 0.006

Instrument Handling

0.2 [−0.3, 0.7]

P = 0.5

0.5 [0.1, 1]

P = 0.03

Knowledge of instruments

0.1 [−0.5, 0.7]

P = 0.9

0.7 [0.1, 1.3]

P = 0.02

Flow of operation

0.5 [0.03, 1.1]

P = 0.03

1.1 [0.6, 1.6]

P < 0.0001

Use of assistant

0.5 [0.09, 0.8]

P = 0.01

0.7 [0.3, 1.04]

P = 0.0004

Knowledge of procedure

0.6 [−0.07, 1.3]

P = 0.08

5.7 [3.4, 8.1]

P = 0.001