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i like the way to remember acd but there is no bacterial etiology in Rheumatoid arthritis is there?
The body recognises chronic inflammatory states as infections
as per goljan, selenium is involved in glutathione peroxidase
selenium has a role in glutathione peroxidase. excess selenium = garlic breath, hair loss, and nail changes, might see peripheral neuropathy. deficiency (pt on TPN) = dilated cardiomyopathy
would require a a large sample size to see if there is a true difference
This question is bogus. CI does not always increase with decreased sample size or vice versa. Four readings with small variation would give a narrower CI than 10 readings with greater variation. The only thing you can be certain about by adding more samples is that the CI will most likely change, but which direction is uncertain.
Recall the formula for 95%ci
Mean +/- 1.96* (SD/sqrt(samplesize))