Table 2

Measures of correlation between CRIES and PIPP

Time after surgery (h)	n	ICC	95% CI
Time after surgery (h)	n	ICC	Lower	Upper
CRIES, Crying, requires oxygen, increased vital signs, expression, and sleepless; PIPP, premature infant pain profile; ICC, intraclass correlation.
Immediately	51	0.6008	0.39	0.75
4	50	0.5449	0.32	71
8	51	0.5602	0.34	0.72
12	50	0.3483	0.08	0.57
16	49	0.3404	0.07	0.57
20	47	0.6329	0.42	0.77
24	48	0.6139	0.40	0.76
32	50	0.3080	0.04	0.54
40	49	0.2049	−0.08	0.46
48	45	0.3864	0.11	0.61
56	47	0.4883	0.24	0.68
64	44	0.4495	0.18	0.66
72	42	0.2523	−0.05	0.51