. Author manuscript; available in PMC: 2012 Jun 18.

Published in final edited form as: Psychooncology. 2011 Feb 4;21(3):297–306. doi: 10.1002/pon.1891

Table 2.

Reliability of coding

Topic	Kappa^a	95% confidence interval	Percentage agreement
Purpose of visit	0.63	0.37, 0.90	89
Prior knowledge about disease	0.64	0.42, 0.86	85
Preference for information	0.52	0.21, 0.83	86
Preference for decision-making role	0.87	0.69, 1.0	95
Treatment recommendation	0.60	0.38, 0.83	95
Impact of treatment on quality of life	0.66	0.44, 0.89	97
Participation in recovery	0.85	0.70. 1.0	99
Treatment goal	0.60	0.38, 0.83	87
Qualitative prognostic information	0.62	0.41, 0.84	91
Quantitative prognostic information	0.74	0.56, 0.91	98
Hedging	0.63	0.44, 0.81	97
Checks for understanding	0.63	0.41, 0.85	82
Complementary/alternative medicine	0.81	0.63, 0.98	91
Clinical trials	0.86	0.67, 1.0	94

Cohen’s Kappa was used to calculate inter-rater reliability for each code using Landis and Kock’s classification (0.21–0.40, fair agreement; 0.41–0.60, moderate agreement; 0.61–0.80, substantial agreement; 0.81–1.0, near-perfect agreement) [31].