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Table 2 Results of quality assessment of included studies

From: Effectiveness of interventions for hypertension care in the community – a meta-analysis of controlled studies in China

Quality items No. of studies
Randomisation sequence generation:  
 - Adequate 3
 - Inadequate (quasi-RCT) 9
 - Unclear 76
 - Cluster design 6
Allocation concealment:  
 - Unclear 94
Blinding (any):  
 - Yes 5
 - No 89
Sample representativeness:  
 - Very likely 22
 - Somewhat likely 47
 - Unlikely or can’t tell 25
Sample size calculated:  
 - Yes 3
 - Unclear or No 91
Comparability between groups:  
 - Reported no significant differences 87
 - Some difference or can’t tell 7
Contamination between arms:  
 - Unlikely 18
 - Somewhat likely 68
 - Very likely 8
Loss to follow up:  
 - Reported 22
 - No reported 72
Outcomes reported:  
 - Blood pressure 48
 - Hypertension treatment 54
 - Adequate hypertension control 56