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Table 2 Methodological quality assessment of included studies by Newcastle–Ottawa scales

From: Association between dementia and mortality in the elderly patients undergoing hip fracture surgery: a meta-analysis

Study

Selection

Comparability

Outcome

 

Exposed Cohort

Nonexposed Cohort

Ascertainment of exposure

Outcome of interest

 

Assessment of outcome

Length of follow-up

Adequacy of follow-up

Total score

Holmes et al.

*

*

*

*

*

*

*

*

8

Hannan et al.

*

*

*

*

*

*

*

7

Mortimore et al.

*

*

*

*

*

*

*

*

8

Pretto et al.

*

*

*

*

*

*

*

7

Julieb et al.

*

*

*

*

*

*

*

7

Hershkovitz et al

*

*

*

*

*

*

*

*

8

Frost et al.

*

*

*

*

*

*

*

7

Lee et al.

*

*

*

*

*

*

*

*

8

Khan et al.

*

*

*

*

*

*

*

7

Kim et al.

*

*

*

*

*

*

*

7

Cenzer et al.

*

*

*

*

*

*

*

7

Tolppanen et al.

*

*

*

*

**

*

*

*

9

Ruggiero et al.

*

*

*

*

*

*

*

7

Reig et al.

*

*

*

*

*

*

*

7

Sheikh et al.

*

*

*

*

*

*

*

7

Karres et al.

*

*

*

*

*

*

*

7

Mitchell et al.

*

*

*

*

*

*

*

7

Jantzen et al.

*

*

*

*

*

*

*

7

  1. Single asterisk indicates 1 score; double asterisk indicates 2 scores, and dash indicates 0 scores