|
Selection
|
|
• Representativeness of the exposed cohort
|
0
|
0
|
0
|
0
|
*
|
0
|
*
|
|
• Selection of the non-exposed cohort
|
*
|
*
|
*
|
*
|
*
|
*
|
*
|
|
• Ascertainment of exposure
|
*
|
*
|
*
|
*
|
*
|
*
|
*
|
|
• Demonstration that outcome of interest was not present at start of study
|
*
|
*
|
*
|
*
|
*
|
*
|
*
|
|
Comparability
|
|
• Study controls for bone ring group
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
• Study controls for any additional factor (duration of exposure)
|
*
|
*
|
*
|
*
|
*
|
*
|
*
|
|
Outcome
|
|
• Assessment of outcome
|
0
|
0
|
0
|
0
|
0
|
0
|
*
|
|
• Was follow-up long enough for outcomes to occur?
|
*
|
*
|
*
|
0
|
*
|
*
|
0
|
|
• Adequacy of follow-up of cohorts
|
*
|
*
|
*
|
*
|
*
|
*
|
*
|
|
Newcastle-Ottawa scale
|
6
|
6
|
6
|
5
|
7
|
6
|
7
|
