Table 5 Statistical analysis of blinding assessment of participants
Methods | Index | p-value | 95% Confidence interval | Conclusion |
|---|---|---|---|---|
Participants blinding 30 kHz | ||||
James’ BI | 0.35 | p < 0.001 | 0.26 to 0.44 | Unblinded |
Bang’s BI-Active/ 2 × 5 | 0.5 | p < 0.001 | 0.29 to 0.70 | Unblinded |
Bang’s BI-Placebo/ 2 × 5 | 0.02 | 0.41 | -0.18 to 0.24 | Blinded |
Participants blinding 40 kHz | ||||
James’s BI | 0.30 | p < 0.001 | 0.22 to 0.39 | Unblinded |
Bang’s BI-Active/ 2 × 5 | 0.66 | p < 0.001 | 0.52 to 0.80 | Unblinded |
Bang’s BI-Placebo/ 2 × 5 | 0.02 | 0.41 | -0.18 to 0.24 | Blinded |
Participants blinding 50 kHz | ||||
James’s BI | 0.28 | p < 0.001 | 0.19 to 0.36 | Unblinded |
Bang’s BI-Active/ 2 × 5 | 0.66 | 0 | 0.53 to 0.78 | Unblinded |
Bang’s BI-Placebo/ 2 × 5 | 0.02 | 0.41 | -0.18 to 0.24 | Blinded |