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Table 1 Criteria used to assess the methodological quality of selected cohort and cross-sectional studies

From: Are depression, anxiety and poor mental health risk factors for knee pain? A systematic review

Item

Criterion

Study type

Study population

  

1

Selection before disease was present or at uniform point

CH/CC/CS

2

Cases and controls were drawn from the same population

CC

3

Participation rate ≥80% for cases/cohort

CH/CC/CS

4

Participation rate ≥80% for controls

CC

5

Sufficient description of baseline characteristics

CH/CC/CS

Assessment of risk factor

  

6

Psychosocial assessment was blinded

CH/CC/CS

7

Psychosocial factors were measured identical for cases and controls

CC

8

Psychosocial factors were assessed prior to the outcome

CH/CC/CS

Assessment of outcome

  

9

Knee OA/pain was assessed identical in studied population

CH/CC/CS

10

Presence of knee OA/pain was assessed reproducibly

CH/CC/CS

11

Presence of knee OA/pain was assessed according to standard definitions

CH/CC/CS

Study design

  

12

Prospective design was used

CH/CC/CS

13

Follow up time ≥2 years

CH

14

Withdrawals ≤20%

CH

Analysis and data presentation

  

15

Appropriate analysis techniques were used

CH/CC/CS

16

Adjusted for at least age and sex

CH/CC/CS

  1. CH, Applicable to cohort studies; CC, Applicable to case-control studies; CS, Applicable to cross-sectional studies; OA, Osteoarthritis.