The Use of Multiple Primary Outcomes in Randomized Controlled Trials of Chinese Herbal Medicine

Table 4

The primary outcome reporting percentage with sample size.

Sample size	No. of RCTs	No. of RCTs that reported primary outcome	No. of RCTs that adopted multiple primary outcomes
Small	52	24 (46.1%)	9 (37.5%)
Medium	118	59 (50.0%)	17 (28.8%)
Large	57	52 (91.2%)	16 (30.8%)
Total	227	135 (59.5%)	42 (31.1%)
value		0.000	0.739