Swallowing disorders and mortality in adults with advanced cancer outside the head and neck and upper gastrointestinal tract: a systematic review

Table 3 Quality assessment

References and year of publication	STROBE	QUIPS	GRADE
Liu et al., 2023 [26]	20 A Level	HIGH 1-M; 2-L; 3-H; 4-H; 5-H; 6-M	A
Marmor S, 2020 [25]	20 A Level	MODERATE 1-L; 2-M; 3-M; 4-L; 5-L; 6-L	B
Abbas MN et al., 2019 [22]	20 A Level	HIGH 1-M; 2-L; 3-L; 4-L; 5-H; 6-M	C
Markos P et al., 2019 [21]	11 B Level	HIGH 1-H; 2-H; 3-M; 4-H; 5-H; 6-H	C
Arscott W et al., 2018 [23]	19 A Level	HIGH 1-L; 2-L; 3-L; 4-M; 5-H; 6-H	B
Kim J et al., 2018 [24]	19 A Level	LOW 1-M; 2-L; 3-L; 4-L; 5-L; 6-L	A
Hatton MQ et al., 2016 [30]	14 B Level	HIGH 1-H; 2-M; 3-M; 4-M; 5-H; 6-H	B
Thier K et al., 2016 [32]	18 A Level	HIGH 1-L; 2-M; 3-L; 4-L; 5-H; 6-H	C
Bradley et al., 2015 [28]	15 B Level	HIGH 1-H; 2-H; 3-M; 4-M; 5-H; 6-H	B
Koekkoek et al., 2014 [27]	17 A Level	LOW 1-M; 2-L; 3-L; 4-L; 5-H; 6-L	C
Ansari M et al., 2014 [31]	17 A Level	LOW 1-L; 2-L; 3-L; 4-L; 5-L; 6-L	A
Ediebah DE et al., 2014 [2]	20 A Level	LOW 1-L; 2-L; 3-L; 4-M; 5-L; 6-L	A
Oberije C et al., 2014 [33]	17 A Level	HIGH 1-L; 2-M; 3-L; 4-L; 5-H; 6-M	C
Schuette W et al., 2012 [29]	20 A Level	MODERATE 1-L; 2-L; 3-M; 4-M; 5-M; 6-L	B

STROBE Studies were scored by quality using Strengthening the Reporting of Observational Studies in Epidemiology initiative: A Level = more than 80% (≥ 17), B Level = 50 to 80% (10 until 16)
QUIPS Quality In Prognosis Studies tool: 1 – Study participation, 2—Study attrition, 3—Prognostic factor measurement, 4—Outcome measurement, 5—Study confounding, 6—Statistical analysis and reporting, L Low risk of bias, M Moderate risk of bias, H High risk of bias, QUIPS LOW 6 low´s or 5 low's + 1 moderate, QUIPS MODERATE 6 moderate's or 2 moderate´s + 4 low's, QUIPS HIGH 6 high's or ≥ 1high´s or ≥ 3 moderate's
GRADE Grading of Recommendations Assessment, Development and Evaluation system: A = High evidence, B = Moderate evidence, C = Low evidence

ISSN: 1472-684X