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Table 1 Results of the primary assessment of quantitative content validity and reliability of the IMOS-specific questionnaires. The questions with unacceptable validity and reliability indexes were corrected

From: Iranian Multi-center Osteoporosis Study (IMOS), 2021–2022: the study protocol

Questionnaire

Quantitative content validity

Reliability

Range of questions’ CVIa

Range of questions’ CVRb

Internal consistency

(Cronbach's alpha)

Intra-rater reliabilityc

Osteoporosis diagnosis

1

0.67—1

0.66

0.81 – 0.93

Osteoporosis treatment adherence

0.61—1

0.67—1

0.56

0.68—1

Fall risk assessment

0.94—1

0.67—1

0.54

0.91—1

Fracture and osteoporosis history

0.78—1

0.67—1

0.61

0.72—1

Modified Oswestry

0.94—1

0.67

0.93

0.75 – 1

Muscle health

1

0.67

0.77

1

Reproductive history

0.89—1

0.67—1

-

0.84—1

Exposure to sunlight

0.89—1

0.67—1

0.63

0.83—1

Knowledge about osteoporosis

1

1

0.86

0.61—1

Medical history

0.61—1

0.67—1

-

0.64—1

Health utilization

1

0.67—1

0.64

1

  1. a Content Validity Index
  2. b Content Validity Ratio
  3. c Range of questions’ Kappa coefficient of agreement or Intra Class Correlation (ICC)