Newcastle-Ottawa quality assessment scale

First author, Publication year

1. Is the
 case definition adequate (OSA is diagnosed with PSG)

2. Representativeness of the cases

3. Selection of Controls

4. Definition of Controls

5. Comparability

^*For Age/sex

  ^*For DM/HTN/BMI

6. Ascertainment of exposure

7. Same method of ascertainment for cases and controls

8. Non-Response rate

Total score^*

Jin, et al. [18]

^*

/

^*

^*

^*

^*

^*

^*

7

(High)

Huang, et al. [19] [19]

^*

^*

/

^*

/

^*

^*

^*

6

(Intermediate)

Lian, et al. [20]

^*

^*

/

^*

^*

^*

^*

^*

7

(High)

Landete, et al. [21]

^*

^*

/

^*

^*

^*

^*

^*

7

(High)

Tomar, et al. [22]

^*

/

/

^*

/

^*

^*

^*

5 (Intermediate)

Lu, et al. [23]

^*

^*

/

^*

^*

^*

^*

^*

7

(High)

Ding, et al. [24]

^*

^*

^*

^*

/

^*

^*

^*

7

(High)

Benotti, et al. [25] [25]

^*

/

/

^*

^*

^*

^*

^*

6

(Intermediate)

Yu, et al. [26]

^*

^*

^*

^*

^*

^*

^*

^*

8

(High)