Health-related quality of life in patients with colorectal cancer in the palliative phase: a systematic review and meta-analysis

Table 1 Quality assessment of included studies

Reference	Criteria								Tot	Quality
Reference	1	2	3	4	5	6	9	10		Quality
Adamowicz [29]	+	+	+	+	+	+	+	+	8/8	High
Asplund [36]	+	+	+	+	+	/	+	+	7/7	High
Färkkilä [28]	+	+	+	+	+	/	+	+	7/7	High
Färkkilä [27]	+	+	+	+	+	/	+	+	7/7	High
Jasinska [37]	+	+	+	+	–	+	+	+	7/8	Moderate
Jasinska [35]	+	+	+	+	–	–	+	+	6/8	Moderate
Kim [38]	+	+	+	+	+	+	+	+	8/8	High
Koskinen [39]	+	+	+	+	+	/	+	+	7/7	High
Mayrbäurl [31]	+	+	+	+	–	+	+	+	7/8	Moderate
Selby [40]	+	+	+	+	–	+	+	+	7/8	Moderate
Stein [30]	+	+	+	+	+	/	+	+	7/7	High
Teker [26]	+	+	+	+	–	/	+	+	6/7	Moderate

Question 6 is not relevant for the cross-sectional designs, and this is symbolised by (/). Questions 11 and 12 in the CASP tool are not relevant for the quality score and are therefore omitted from the table
High quality for the cross-sectional studies = 7, moderate = 5–6, low < 5. High quality for the longitudinal studies = 8, moderate = 6–7, low < 6. Jasinska et al. [35] is included in the table, however, excluded for further analyses because of methodological weakness (see ‘Results of the quality assessment’ for details)

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