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Effectiveness outcomes.
| All | MET arm | DFD arm | χ 2 | P | ||
|---|---|---|---|---|---|---|
| VPC | Valid | 105 | 45 | 60 | 4.500 | 0.034 |
| Invalid | 31 | 20 | 11 | |||
|
| ||||||
| TSS | Valid | 117 | 50 | 67 | 8.591 | 0.003 |
| Invalid | 19 | 15 | 4 | |||
Abbreviation: MET arm: metoprolol combined with placebo; DFD arm: Dingji Fumai Decoction combined with metoprolol; VPC: ventricular premature contraction; TSS: traditional Chinese medicine syndrome score.
