Table 2—

Quality scores analysis of the eligible studies

Studies (n)Design#Laboratory method#Generalisability#Results analysis#Global score %
All (16)4.006.436.675.0056.34
Evaluable for MA (11)4.007.146.675.0061.70
Not evaluable for MA (5)4.005.005.003.7548.84
p-value0.280.110.610.140.19
Significant (4)5.006.435.425.0054.70
Nonsignificant (12)4.006.436.675.6256.34
p-value0.360.850.270.950.90
Negative (3)4.005.714.175.0047.38
Significant studies in MA (4)5.006.425.415.0054.70
Nonsignificant studies in MA (7)4.007.146.677.5061.70
p-value0.570.700.130.570.44
  • Scores are median scores of the studies

  • MA: meta-analysis

  • #: scored out of 10