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Table 2 Quality of included studies

From: The prevalence of obstructive sleep apnea in mild cognitive impairment: a systematic review

Author Criteria for inclusion in the sample clearly defined? Study subjects and the setting described in detail? Exposure measured in a valid and reliable way? An objective, standard criteria used for measurement of the condition? Confounding factors identified? Strategies to deal with confounding factors stated? Outcomes measured in a valid and reliable way? Appropriate statistical analysis used?
Dlugaj et al. [24] Yes Yes Yes Yes Yes Yes No Yes
Guarnieri et al. [26] Yes Yes Yes Yes Yes Yes No Yes
Kim et al. [27] Yes Yes Yes Yes Yes No Yes Yes
Osorio et al. [2] Yes Yes Yes Yes Yes Yes No Yes
Wilson et al. [28] Yes Yes Yes Yes Yes No Yes Yes