Flashcards
presenting the evidence
Cards in this deck (17)
- 1name some information resources- systematic review/meta analyses
- clinical practice guidelines - NICE, SIGN
- original article containing primary research data - 2what is the null hypothesisthere is no statistical significance between teh two variables
researcher tries to disprove - 3what is the alternative hypothesisthere is a statistical significant relationship between the two variables
- 4what types of categorical variables do you get- nominal (unordered categories)
- ordinal (ordered) (high to low) - 5how do you determine the probability that the null hypothesis is correct?P value
- 6what does it mean if the P value is large?null hypothesis is correct, two populations are similar
- 7what is the cutt off point when the null hypothesis can be objected?P < 0.05
there is statistically a difference - 8what does P = 0.1 mean?there is a 10% chance that the null hypothesis is correct
- 9what does P value of <0.01 mean?less than 1% chance null hypothesis is correct
strong evidence against null in favour of the alternative - 10what is a type 1 error?rejecting the null hypothesis when it is true (false positive)
- 11type 2 error?accepting the null hypothesis when it is false (false negative)
- 12what is the power of a test?the power of a test is its ability to rejective null hypothesis when it is false
- teh capacity to detect an effect if there is one - 13why is confidence intervals more informative than the simple hypothesis testS?they provide a range of plausible values for the unknown parameter
- 14why are confidence intervals better than P values?1. give a range of possible effect sizes
2. embrace the value of no difference between treatments
3. help interpret data by placing upper and lower bounds on the tree effect size
4. statistically significant does not equal clinically significant - size of effect determines importance - 15what is the reference line?the expected
- 16how do you measure the effectiveness of interventions?1. number needed to treat
2. relative risk
3. odds ratio - 17—
Information
- Description
- Practice of Medicine (Respiratory) Flashcards on presenting the evidence, created by hazel wilkie on 10/12/2017.
- Created by
- hazel wilkie
- Views
- 0
- Rating