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Table 1 Summary of cross-sectional psychometric properties of the QUALIOST® by country

From: Cross-cultural validation and analysis of responsiveness of the QUALIOST®: QUAlity of Life questionnaire In OSTeoporosis

Scale

Country

N

Item convergent validity

Item discriminant validity

Cronbach's α

Floor (%)

Ceiling (%)

   

Range of correlations

Success rate (%)

   

Physical

Australia

88

0.49–0.79

90.0

0.91

5.7

0.0

 

Belgium

179

0.63–0.79

100.0

0.93

1.1

0.0

 

France

148

0.65–0.81

90.0

0.93

0.7

0.0

 

Italy

360

0.56–0.70

90.0

0.89

0.6

0.0

 

Poland

257

0.53–0.73

90.0

0.90

0.4

0.0

 

Spain

107

0.48–0.79

80.0

0.89

0.0

0.0

 

The UK

151

0.68–0.87

80.0

0.95

1.3

0.0

 

Overall

1465

0.62–0.74

90.0

0.92

1.2

0.0

Emotional

Australia

88

0.56–0.75

76.9

0.93

2.3

0.0

 

Belgium

179

0.47–0.78

84.6

0.92

0.0

0.0

 

France

148

0.58–0.82

100.0

0.93

0.0

0.0

 

Italy

360

0.55–0.74

92.3

0.92

0.0

0.0

 

Poland

257

0.57–0.76

92.3

0.92

0.0

0.8

 

Spain

107

0.47–0.81

61.5

0.93

0.0

0.0

 

The UK

151

0.61–0.81

84.6

0.95

0.7

0.0

 

Overall

1465

0.52–0.78

100.0

0.93

0.3

0.1

Total

Australia

88

0.50–0.85

.

0.95

2.3

0.0

 

Belgium

179

0.45–0.79

.

0.95

0.0

0.0

 

France

148

0.59–0.80

.

0.96

0.0

0.0

 

Italy

360

0.55–0.75

.

0.94

0.0

0.0

 

Poland

257

0.52–0.80

.

0.95

0.0

0.0

 

Spain

107

0.45–0.85

.

0.95

0.0

0.0

 

The UK

151

0.59–0.87

.

0.97

0.7

0.0

 

Overall

1465

0.56–0.80

.

0.95

0.3

0.0

  1. Item convergent validity success rate: 100% for each scale (all countries)