. 2021 Oct 18;36(12):2381–2398. doi: 10.1002/jbmr.4449

Table 3.

Quality Assessment Using Newcastle‐Ottawa Scale for the Cohort Studies

	Selection				Comparability	Exposure
Cohort studies	Representativeness of the exposed cohort	Selection of the non‐exposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at start of study	Control for important factor or additional factor	Ascertainment of outcome	Was follow‐up long enough for outcome to occur	Adequacy of follow‐up of cohorts	Total score
Biver and colleagues⁽ ³⁶ ⁾	*	*	*	*	**	*	*	*	9
Burt and colleagues⁽ ¹¹ ⁾	*	*	*	*	**	*	*	*	9
Langsetmo and colleagues⁽ ¹² ⁾		*	*	*	**	*	*	*	8
Sornay‐Rendu and colleagues⁽ ³⁵ ⁾		*	*	*	**	*	*	*	8
Szulc and colleagues⁽ ¹³ ⁾	*	*		*	**	*	*	*	8

* Each star represents 1 score.