Measuring agreement between healthcare survey instruments using mutual information

Table 4 Comparison of FAM-CAM with other instruments

		Comparison using local mutual information
Pair no.	Comparisons of FAM-CAM with	I _agreement	I _disagreement	Mutual information	Result	Odds ratio	Kappa
1	CAM	0.629	-0.137	0.492	Agreement (p-value < 0.01)	248	0.858
2	Feature of CAM: Acute onset & fluctuating courses	0.356	-0.177	0.179	Agreement (p-value < 0.01)	17.6	0.424
3	Feature of CAM: Inattention	0.196	-0.148	0.048	Agreement (p-value < 0.1)	3.125*	0.237
4	Feature of CAM: Disorganized thinking	0.320	-0.116	0.204	Agreement (p-value < 0.01)	∞**	0.346
5	Feature of CAM: Altered level of consciousness	-0.022	0.025	0.003	Inconclusive	0.65*	-0.051*
6	FAM-CAM on a group using smart phones	0.519	-0.245	0.274	Agreement (p-value < 0.05)	18***	0.607
7	FAM-CAM from other study	0.551	- 0.099	0.452	Agreement (p-value < 0.01)	∞**	0.805

(Note: *insignificant at confidence level = 90 %, **Infinity since one of the cells contains 0, ***insignificant at confidence level = 95 %, but significant at level = 90 %,)

ISSN: 1472-6947