Table 1 Quality assessment results of the included studies by the IHE case series quality assessment tool

1

The hypothesis, purpose and objective of the study clearly stated.

1

1

1

1

1

1

1

1

1

2

Describe the characteristics of the patient.

1

1

1

0

1

1

1

1

1

3

Multicenter case collection.

1

1

1

1

1

0

0

1

0

4

The inclusion and exclusion criteria are clear and reasonable.

1

0

1

0

1

1

1

1

1

5

Include patients consecutively.

1

1

1

1

0

1

1

1

1

6

Patients are in the same condition.

1

1

1

1

1

1

1

1

1

7

Describe the interventions clearly.

1

1

1

1

1

1

1

1

1

8

Describe joint interventions clearly.

0

0

0

0

1

0

0

1

0

9

Clarify the outcome of the measurement in advance.

1

1

1

1

1

1

1

1

1

10

Reasonable objective and/or subjective methods to measure outcome.

1

1

1

1

1

1

1

1

1

11

Outcome parameters were measured before and after intervention.

1

1

1

1

1

1

1

1

1

12

Reasonable statistical tests are used to evaluate the result parameters.

1

1

1

1

1

1

1

1

1

13

Report follow-up time.

1

1

1

1

1

1

1

1

1

14

Report loss follow-up.

1

1

1

1

1

0

1

1

1

15

Data analysis of outcome measures provided random variable estimates.

1

1

1

1

1

1

1

1

1

16

Report intervention-related adverse events.

1

1

1

1

1

0

1

1

1

17

Research results support conclusions.

1

1

1

1

1

1

1

1

1

18

Statement of conflicts of interest and sources of support for the research.

1

1

1

1

1

0

1

1

1

19

Prospective research.

0

0

1

1

1

1

0

1

1

20

Blind for outcome reviewers.

1

1

0

0

0

0

1

1

0

Score

18

17

18

16

18

14

17

20

17