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ForumsPublic SquareInjection site rotation systematic review — looking for input

Injection site rotation systematic review — looking for input

tyler_CSCS Mon, Jul 21, 2025 at 8:12 AM 17 replies 1,523 viewsPage 1 of 4
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tyler_CSCS
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Jul 21, 2025 at 8:12 AM#1

Same technique for eight months and the site reactions started in month nine, which rules out most of what I assumed the cause was.

So the question, as narrowly as I can put it: whether site reactions are a material issue or a technique issue, and what people changed that actually helped.

Not looking for reassurance. Looking for the part I have got wrong.

28 23sean_dublin, hannah_MT, Dr.SportsMedIN and 25 others
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Dr.KarenChen
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Jul 21, 2025 at 10:27 AM#2

Short answer first, then the reasoning. Relative and absolute effects need reading together. A 20% relative reduction on a high baseline risk is a large absolute benefit; the same relative figure on a low baseline risk is a small one, and press summaries almost always quote the relative number because it is bigger.

27 22JessicaM_2024, TomFromTexas, mike.trainer_LA and 24 others
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maria_elpaso
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Jul 21, 2025 at 12:42 PM#3
Dr.KarenChen said:
Relative and absolute effects need reading together.

Agreed, and subgroup analyses deserve particular suspicion. With enough subgroups something is significant by chance, and pre-registered subgroups are a different animal from ones found afterwards.

Last edited: Jul 21, 2025 at 6:42 PM
26 21TrialNerd_Beth, HPLC_Greg, LibrarianMeg and 23 others
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DadBodDave
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Jul 21, 2025 at 2:57 PM#4
tyler_CSCS said:
Same technique for eight months and the site reactions started in month nine, which rules out most of what I assumed the cause was.

This is my experience too, for whatever a second data point is worth.

25 20Dr.GastroMayo, JakeBK_lifts, DerekSJ_a1c and 22 others
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sean_dublin
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Jul 22, 2025 at 4:24 AM#5

Adding the clinical framing, because it changes how the question reads.

Helpful tip for injection-site reactions needle anxiety: ice the injection site for 30 seconds before injecting. You'll barely feel the 30g needle go in. I went from dreading injection day to not even flinching.

Also, don't watch the needle enter your skin. Look away, take a deep breath, and it's over in seconds.

24 19quinn_sf, NurseLeah_Nash, gary_naperville and 21 others
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