Table 2 List of items extracted from each article

1.

Article details (author(s), title, country, source)

2.

Objective(s) of study

3.

Study design (cross-sectional or cohort/longitudinal)

4.

Method of data collection (registry, questionnaire, interview, examination, etc.)

5.

Sampling method and sample data (age, gender ratio, target population, study sample, response rate)

6.

Description of MSK condition (definition, type and validation of questionnaire)

7.

Outcome data (type of prevalence/incidence, results (including gender and age estimates, 95% CI)

8.

Own remarks or conclusion