Table 4: The inter-rater reliability of NIPS between five nurses using NIPS to assess pain score before, during and after clinical procedures at the first and second assessment

	Before (n=30)		During (n=30)		After (n=30)
	ICC (95%CI)	p	ICC (95%CI)	p	ICC (95%CI)	p
First assessment	0.77 (0.66; 0.87)	<0.01	0.28 (0.14; 0.48)	<0.01	0.60 (0.45; 0.75)	<0.01
Second assessment	0.77 (0.66; 0.87)	<0.01	0.33 (0.18; 0.53)	<0.01	0.63 (0.48; 0.77)	<0.01

ICC: intraclass correlation coefficient; 95%CI: 95% confidence interval
Five nurses assessed 30 videos, two-way random-effects absolute agreement model was used to assess inter-rater reliability