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Table 4 Discriminative properties with respect to prevalent vertebral fractures

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

OPAQ Scales Mean Number of Prevalent Vertebral Fractures p-value
0 (n =436) 1 (n =563) 2 (n =257) 3 (n =102) ≥ 4 (n =116) Linear Trenda 0 vs. ≥1b 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
  1. Abbreviations: n = number; OPAQ = Osteoporosis Assessment Questionnaire; vs. = versus.
  2. *p <0.05; **p <0.001; ***p <0.0001.
  3. 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.
  4. 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.