BMC Palliative Care

Table 4 Reliability between Patients and Caregivers for both the Intervention and the Control Group

From: Do surrogates predict patient preferences more accurately after a physician-led discussion about advance directives? A randomized controlled trial

Questions	Phase 1		Phase 2
	Intervention	Control	Intervention	Control
	Cohen’s κ [95.0% CI]	Cohen’s κ [95.0% CI]	Cohen’s κ [95.0% CI]	Cohen’s κ [95.0% CI]
Q1	0.37 fair	0.16 fair	0.61 substantial ^a	0.19 fair
Q1	[0.03;0.71]	[-0.2;0.52]	[0.32;0.91]	[-0.12;0.51]
Q2	0.31 -fair	0.27 fair	0.31—fair	0.26 fair
Q2	[-0.07;0.69]	[-0.1;0.63]	[-0.07;0.69]	[-0.03;0.55]
Q3	0.15 slight	0.21 fair	0.50 moderate ^a	0.29 fair
Q3	[-0.22;0.51]	[-0.15;0.57]	[0.17;0.82]	[-0.06;0.64]
Q4	-0.17 slight	0.3 fair	0.05 slight	0.24 fair
Q4	[-0.51;0.16]	[-0.05;0.65]	[-0.24;0.35]	[-0.11;0.59]
Q5	-0.21 slight	0.29 fair	0.18 slight	0.1 slight
Q5	[-0.54;0.11]	[-0.06;0.64]	[-0.11;0.46]	[-0.26;0.46]
Q6	-0.12 slight	0.23 fair	0.17 slight	0.24 fair
Q6	[-0.46;0.22]	[-0.13;0.58]	[-0.12;0.45]	[-0.11;0.59]
Q7	-0.12 slight	0.21 fair	0.21 fair ^a	0.06 slight
Q7	[-0.46;0.22]	[-0.15;0.57]	[-0.09;0.51]	[-0.3;0.43]
Q8	0.37 fair	0.10 slight	0.55 moderate ^a	-0.22 slight
Q8	[-0.01;0.75]	[-0.25;0.45]	[0.2;0.9]	[-0.57;0.12]
Q9	NA	0 slight	NA	0 slight
Q9	NA	[0;0]	NA	[0;0]
Q10	NA	0 slight	NA	0 slight
Q10	NA	[0;0]	NA	[0;0]
Q11	0.34 fair	-0.18 slight	0.87 perfect ^a	0.28 fair ^a
Q11	[-0.11;0.8]	[-0.3;-0.06]	[0.62;1]	[-0.16;0.71]
Q12	-0.11 slight	0 slight	-0.05 slight	0.36 fair ^a
Q12	[-0.22;0.01]	[0;0]	[-0.12;0.02]	[-0.16;0.89]

^areliability increase in the second phase from one category to other (slight < fair < moderate < substantial < perfect),

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ISSN: 1472-684X

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