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Table 4 Risk of bias of the cohort study

From: Efficacy and safety of Z-substances in the management of insomnia in older adults: a systematic review for the development of recommendations to reduce potentially inappropriate prescribing

Study

Clear focus of research

Acceptable recruitment of cohort

Accurate measurement of exposure

Accurate measurement of outcome

Identification and consideration of confounding factors

Appropriate length and scale of follow-up

Results and precision

Believability of results

Local application

Confirms available research

Avidan 2010

Yes

Yes

Yes

Yes

Yes

Unknown

OR 1.12 after 1 month OR 1.48 after 3 months (CI95 n.r.) P < 0.05

Yes

Yes

Yes