Prognostic value of gasping for short and long outcomes during out-of-hospital cardiac arrest: an updated systematic review and meta-analysis

Table 2 Risk of bias assessment of the observational studies

Study	Selection				Comparability	Outcome			Total Score
Study	Exposed Cohort	Nonexposed Cohort	Ascertainment of Exposure	Outcome of Interest		Assessment of Outcome	Length of Follow-up	Adequacy of Follow-up	Total Score
Martens	..	*	*	*	* *	*	*	*	8
Debaty	*	*	*	*	* *	*	*	*	9
Wolfskeil	*	*	*	*	*	*	*	*	8
Knor	*	*	*	*	* *	*	*	..	9
Fukushima	*	*	..	*	* *	*	*	*	8

Risk of bias was assessed using the Newcastle-Ottawa Scale. A higher overall score corresponds to a lower risk of bias; a score of ≤5 (out of 9) indicates a high risk of bias

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