Using a post-hoc power analysis, the study is slightly underpowered using cutoff of .80. Effect size is small.

reviewer的意見:

Power: Using a post-hoc power analysis, the study is slightly underpowered using cutoff of .80. Effect size is small.


回應:
Response:
  Cohen recommended to set the type I error α as 0.05 and type II error β as 0.2 (i.e. power=0.8) to present the acceptable possibility of type I and type II error. In our study, we used the data of the 157 patients who completed both the admission and discharge assessments and found effect size of the PDT was 0.4. Using the post-hoc power analysis with set value of type I error α = 0.05, we found that the power was 0.99 (i.e. type II error=0.01) in our study. So the possibilities of making an inferential mistake would be low.

Table 2. Convergent validity, predictive validity, and responsiveness of the PDT

reviewer's comment:

a. The authors present findings only associated with very restricted hypotheses. They often explain only significant findings, without exploring those that are null or not significant. It would be helpful if all data analyzed was presented, e.g., all correlations among variables, at each time point. This allows for more clear interpretation of positive findings and the relationship among variables. The lack of transparency confidence in presented results

以表格回應

Table 2. Convergent validity, predictive validity, and responsiveness of the PDT 

table for demographic data

Characteristic	Patients Who only Completed the Admission, Assessment (n=209)	Patients Who Completed the Admission and Discharge Assessment (n=157)	Patients Who Completed the Admission, Discharge, and One-year follow up Assessment (n=94)
	n (%), Mean ± SD
Sex
Male	134 (64%)	104 (66%)	60 (64%)
Female	75 (36%)	53 (34%)	34 (36%)
Age (years)	65.6 ± 12.8	61.76 ± 13.9	61.1 ± 14.0
Stroke type
Cerebral hemorrhage	72 (34%)	59 (38%)	36 (38%)
Cerebral infarction	137 (66%)	95 (62%)	58 (62%)
Affected side
Right	109 (52%)	80 (51%)	52 (55%)
Left	93 (45%)	72 (46%)	41 (44%)
Bilateral	7 (3%)	5 (3%)	1 (1%)
Days from onset to admission assessment	21.4 ± 18.0	23.0 ± 20.3	23.4 ± 23.2
Days from onset to discharge assessment	56.9 ± 51.1	51.8 ± 23.9	50.6 ± 25.5
Days of rehabilitation ward stay	33.12 ± 16.2	33.1 ± 14.81	31.2 ± 13.0
Admission PDT score	5.8 ± 2.1	5.9 ± 1.9	5.8 ± 2.0
Admission BI score	36.4 ± 19.7	36.5 ± 20.2	37.9 ± 18.6
Admission MMSE score	20.4 ± 7.8	20.5 ± 7.5	20.4 ± 7.8
Discharge PDT score	N/A	6.6 ± 2.0	6.6 ± 2.2
Discharge BI score	N/A	75.3 ± 19.9	77.1 ± 18.1
Discharge MMSE score	N/A	23.5 ± 6.2	23.2 ± 6.7
One-year follow-up BI score	N/A	N/A	87.5 ± 24.0