I don't suppose i can ask a question on power calculations?

I've just conducted a RCT involving two student groups one undertaking an educational intervention and another receiving standard clinical teaching. Both groups did a 24 item MCQ knowledge assessment and a 7 statement questionnaire on confidence using 5 point Likert scales.

The power calculations are a bit haphazard as the original statistician bailed out and I'm trying to pick up the pieces in writing this.

The statistical analyses i used were

paired sample t-tests for the 24item MCQs

Wilcoxon signed rank tests for the confidence questionnaires.

Note: I didn't make any inter-group comparisons, only intra-group pre/post.

Using the G-Power calculator I did an A priori calculation assuming power of 0.8 and an effect size of 0.5 and noted I needed a sample size of 34 and 35 for the paired t and wilcoxon signed tests respectively.

I achieved sample sizes of 55 and 53.

I then did some post hoc calculations after calculating the effect sizes I achieved and noted that my paired t-tests had sufficient power of >0.95 but of the 7 statements in my confidence questionnaire (Analysed using Wilcoxon signed rank tests) 2 of the 7 statements had powers of <0.8 (One was 0.65 and another was 0.12)

Am I correct in assuming then that my a priori precalculations guided me towards the appropriate sample sizes and the post hoc calculations confirmed that I had sufficient power or not? (And that i did all the above correctly instead of going on a tangent)

How do I present this? Am presenting this work next month and if they ask me did i attain sufficient power would my answer be: yes for the paired t-tests and 5 of the 7 statements only.

Many thanks!