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Table 2 Quality assessment of studies included in this meta-analysis by Newcastle-Ottawa Scale

From: Is diabetes mellitus a risk factor for low bone density: a systematic review and meta-analysis

Study

Selection

Comparability

Exposure

Quality evaluation

Cases definition

Cases representativeness

Control selection

Controls definition

Comparability

Ascertainment of exposure

Same ascertainment

Non-response rate

Shaw CK 1993 [33]

a

b

a

a

b

b

a

a

7

Chumnumnawin M 2008 [34]

a

a

b

a

b

b

a

a

7

El-Heis MA 2013 [35]

a

b

b

a

b

b

a

a

6

Zhou R 2013 [36]

a

a

a

a

a + b

b

a

a

8

Daisuke A 2015 [37]

a

a

b

a

b

b

a

a

7

Saei GNM 2015 [38]

a

a

b

a

b

b

a

a

7

Liu D 2016 [39]

a

a

a

a

a + b

b

a

a

9

Neglia C 2016 [40]

a

b

c

a

b

b

a

a

6

Dana H 2017 [41]

a

a

a

a

b

b

a

a

8

Heidari B 2017 [42]

a

a

a

a

b

b

a

a

8

Lee SH 2017 [43]

a

a

a

a

b

b

a

a

8

Lin HH 2018 [44]

a

b

b

a

b

b

a

a

6

Yoo JE 2018 [45]

a

a

b

a

a + b

b

a

a

8

Wang Y 2019 [46]

a

a

b

a

b

b

a

a

7