relative risk

  1. G

    i don't understand "Relative Risk" in this study

    hi, how can this be, that they say that the RR of 1.19 is an increase, and the RR 1.26 and RR 1.68 in not an increase? "elevated serum PTH concentration increased the risk of all-cause mortality (RR 1.19; 95% CI 1.08–1.30) but not for cardiovascular mortality (RR 1.26; 95% CI 0.96–1.66)...
  2. M

    Conversion from low vs. high to high vs. los (Relative Risk)

    Hi :) I'm writing my bachelorthesis about the effects of physical activity in prevention. Most of the studies I included compared high physical activity with low physical activity (as reference category) but a few did it the other way round and compared low physical activity with high physical...
  3. J

    Please help interpret cross-sectional study results (odds ratio, relevant risk, etc.)

    I'm trying to help my wife with some statistics. She's looking to see if people with Removable Dentures (RD) have a higher prevalence of Combination Syndrome (CS). She did a cross-sectional study (survey) of 314 patients at her university. Of the 314 patients surveyed, 200 had Removable...
  4. A

    Combining two ORs with the same control group

    Hi everybody. I am doing a meta-analysis of observational studies. As the disease I am working on has different stages, some of the studies reported ORs(95%CI) for each stage separately in comparison to a single (shared) control population. I wonder if we can combine these two ORs (and their...
  5. R

    Can a relative risk and odds ratio differ in p-value?

    With increasing incidence of the outcome, odds ratios tend to overestimate relative risks. I was wondering whether they also start to differ in p-values. So my question is: could there be a situation where the (unadjusted) odds-ratio reaches statistical significance, but the (unadjusted)...
  6. O

    Working out risk factors for a medical complication?

    Hi All - HELP! I have a large dataset on women in labour, and I'm interested in finding out risk factors for a particular complication of labour. The complication is either there, or not there. I also have lots of information on possible risk factors for the complication, e.g.: length of...
  7. E

    Relative Risk Ratio (RRR) Analysis with a Continuous Predictor

    Hi, I am hoping that someone can help me with a relative risk ratio analysis. I'm trying to assess the ability of a continuous variable to predict a categorical outcome (the base group - Y) relative to other possible outcomes. The RRR analysis gave me the RRR for the likelihood of outcome A...
  8. T

    Meta analysis possible if only Relative Risks and 95% CI's are available?

    Dear members, My knowledge of statistics is extremely limited. Since a few months I am wondering if it is possible to perform a meta analysis in SPSS if only Relative Risks (RR's) and 95% CI's are available from scientific publications. Here is a link to a table showing a meta-analysis...
  9. S

    Relavance of confidence interval in Relative Risk

    What exactly the relavance of the confidence interval of a Relative Risk? heard that if the CI includes 1, then there is no statistically significant relative risk. in that case can we conclude that what ever the RR is purely due to chance and no risk at all. really needa help in this...