The sample size for this study was calculated using G ∗ Power analysis. With a significance level (α) of 0.05, a statistical power (1 − β) of 0.80, and an effect size of 0.74, as calculated from previous studies [14], we calculated a need for 30 aromatherapy and 30 control subjects. After factoring in the failure rate, data were collected from a total of 66 subjects, and 8 patients who transferred rooms during the experiment were excluded; therefore, the data from 28 subjects in the aromatherapy group and 28 subjects in the control group were analysed.
The sample size for this study was calculated using G ∗ Power analysis. With a significance level (α) of 0.05, a statistical power (1 − β) of 0.80, and an effect size of 0.74, as calculated from previous studies [14], we calculated a need for 30 aromatherapy and 30 control subjects. After factoring in the failure rate, data were collected from a total of 66 subjects, and 8 patients who transferred rooms during the experiment were excluded; therefore, the data from 28 subjects in the aromatherapy group and 28 subjects in the control group were analysed.
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