The functional barometer –a self-report questionnaire in accordance with the international classification of functioning, disability and health for pain related problems; validity and patient-observer comparisons

Table 2 Measures of agreement, disagreement and association in assessments on the items of function/activity in the Functional Barometer, FB(1.0) and on similar items on the Balanced Inventory for Spinal Disorders (BIS)

The FB(1.0) items	The BIS items	n	RP	RV
Function/activity	Physical limitations	PA (%)	(95% CI)	(95% CI)
Function/activity	Physical limitations	r _s	(95% CI)	D
Walking	Outdoor activities (shopping etc)	89	0.16	0.17
		36%	(0.04 to 0.28)	(0.08 to 0.26)
		r_s 0.45	(0.04 to 0.28)	0.14
Walking	Walking ability	87	-0.36	0.04
		32%	(-0.45 to -0.26)	(0.008 to 0.06)
		r_s 0.73	(-0.45 to -0.26)	0.06
Walking up and down stairs	Walking ability	87	-0.37	0.09
		32%	(-0.47 to -0.26)	(0.03 to 0.14)
		r_s 0.61	(-0.47 to -0.26)	0.10
Making the bed	Indoor activities (cleaning, cooking)	85	0.40	0.11
		28%	(0.30 to 0.51)	(0.04 to 0.17)
		r_s,0.55	(0.30 to 0.51)	0.11
Going by car, bus, train	Outdoor activities (shopping etc)	87	0.23	0.22
		39%	(0.10 to 0.35)	(0.09 to 0.34)
		r_s 0.40	(0.10 to 0.35)	0.16
Going by car, bus, train	Leisure activities e.g. traveling, sports, societies	87	0.44	0.18
		34%	(0.33 to 0.54)	(0.07 to 0.29)
		r_s 0.47	(0.33 to 0.54)	0.14
Lifting, carrying a shopping bag	Outdoor activities (shopping, etc)	89	-0.06	0.13
		45%	(-0.17 to 0.05)	(0.02 to 0.25)
		r_s 0.53	(-0.17 to 0.05)	0.10
Exercise/sports	Leisure activities e.g. traveling, sports, societies	89	0.05	0.09
		43%	(-0.05 to 0.16)	(0.03 to 0.16)
		r_s 0.56	(-0.05 to 0.16)	0.10
Easy work	Indoor activities (cleaning, cooking)	86	0.41	0.18
		30%	(0.29 to 0.52)	(0.08 to 0.29)
		r_s 0.43	(0.29 to 0.52)	0.15
Sleeping in nights	I have sleeping disturbances	86	0.15	0.008
		53%	(0.077 to 0.22)	(0 to 0.02)
		r_s 0.84	(0.077 to 0.22)	0.02
Ordinary housework	Indoor activities (cleaning, cooking	87	0.37	0.06
		40%	(0.27 to 0.46)	(0.02 to 0.10)
		r_s 0.62	(0.27 to 0.46)	0.08

The measures of percentage agreement (PA), of the systematic disagreement in position (RP), of individual variability (RV), of disorder (D), and corresponding 95% confidence intervals (95% CI), and the Spearman rank-order correlation coefficient (r_s).

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