Psychometric properties of the osteoporosis assessment questionnaire (OPAQ) 2.0: results from the multiple outcomes of raloxifene evaluation (MORE) study

Table 4 Discriminative properties with respect to prevalent vertebral fractures

OPAQ Scales	Mean Number of Prevalent Vertebral Fractures					p-value
OPAQ Scales	0 (n =436)	1 (n =563)	2 (n =257)	3 (n =102)	≥ 4 (n =116)	Linear Trend^a	0 vs. ≥1^b	0-1 vs. ≥2	0 vs. ≥2
Walking/bending	87.78	85.12	83.68	78.37	72.82	<0.0001***	0.0054*	<0.0001***	<0.0001***
Standing/sitting	85.20	79.12	76.78	70.87	63.15	<0.0001***	<0.0001***	<0.0001***	<0.0001***
Dressing/reaching	93.60	92.93	91.93	87.75	85.78	<0.0001***	0.4923	0.0030*	0.0557
Household/self-care	94.63	92.28	89.84	86.94	84.48	<0.0001***	0.0076*	<0.0001***	<.00001***
Transfers	93.55	90.15	90.60	82.84	83.03	<0.0001***	0.0030*	0.0012*	0.0002**
Usual work	93.92	91.29	89.26	86.39	80.22	<0.0001***	0.0078*	<0.0001***	0.0002**
Fear of falls	76.51	72.36	70.38	64.47	61.47	<0.0001***	0.0030*	<0.0001***	<.00001***
Level of tension	65.60	68.63	66.94	64.33	66.38	0.3084	0.0604	0.1486	0.8017
Body image	68.95	64.51	63.48	59.42	54.89	<0.0001***	0.0005**	0.0006**	0.0003**
Independence	86.41	83.26	81.20	77.02	74.78	<0.0001***	0.0026*	<0.0001***	<0.0001***
Back pain	78.92	71.97	69.72	61.60	56.61	<0.0001***	<0.0001***	<0.0001***	<0.0001***
Fatigue	63.62	62.34	61.33	56.19	58.26	0.0005**	0.1631	0.0054*	0.0141*
Social activity	39.69	41.12	38.28	39.71	41.59	0.0060*	0.5474	0.0030*	0.0468*
Support, family and friends	83.58	85.51	84.55	89.09	85.67	0.4562	0.2150	0.6822	0.4006

Abbreviations: n = number; OPAQ = Osteoporosis Assessment Questionnaire; vs. = versus.
*p <0.05; **p <0.001; ***p <0.0001.
^ap-values for linear trend based on analysis of covariance model controlling for country of origin, age, body mass index (BMI), years since menopause, smoking status (yes vs. no), alcohol consumption (yes vs. no), and number of preexisting conditions.
^bp-values based on analysis of covariance model controlling for country of origin, age, body mass index (BMI), years since menopause, smoking status (yes vs. no), alcohol consumption (yes vs. no), and number of preexisting conditions.

ISSN: 1471-2474