To Whom It may Concern:
Here is my stats issue:
2 separate groups of shoulder surgery patients
27 in each group (total of 54 patients)
All patients received a subacromial pain pump
Randomly, 27 received an interscalene block, the other 27 received a saline pump (so that is 2 groups 1 interscalene block, 1 saline pump)
Then we want to assess surgery severity, so a second variable.
The surgery severity is based on whether they did or did not receive a rotator cuff (RC) repair (RC generally means more pain)
The end point is amount of pain meds the patients took which is based on both the type of pain pump they received (scalene block vs saline) and surgery severity (RC vs Non-RC).
I thought a 2 way ANOVA was the way to go, but after a few days of working on spss I am not so sure.
If you have time to share your thoughts I would be grateful.
Finally, if we assume I have made the correct stats decision if someone can walk me through the pull down menus.
I am ok at the start, but I think I am missing a piece of importance when I try to make the 2 comparisons (1-pain pump type) and surgery severity (Rotator cuff vs No RC).
Thanks in advance for your help.
Bill
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