Table 2. Quality of assessments of procedural assessment and knowledge test.

	Cohort 2015-2016		Cohort 2016-2017
	Cronbach’s alpha	Omega ( ω h )	Cronbach’s alpha	Omega ( ω h )
Knowledge test
Original test (21 questions in 2015-2016, 18 questions in 2016-2017)	0.48	0.36	0.78	0.36
Test 2015-2016, without poor performing items (8 questions)	0.66	0.31	-	-
Procedural assessment
Scrubbing and donning	-0.01	N/A 1	-0.29	N/A 1
Local anaesthesia	0.55	0.56	0.71	0.43
Incision/Excision	0.85	0.67	0.63	0.41
Suturing skills	0.94	0.85	0.79	0.54

¹ Four items had no variation and hierarchical omega ( ω _h ) could not be calculated for all 11 items of the scrubbing checklist. These items were removed from further analysis.