Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Biostatistics
| Question | Answer |
|---|---|
| Continuous Data | Data is provided by some type of measurement which has unlimited options of continuous data Two types: Ratio data & interval data |
| Ratio Data | Equal difference between values, with a true, meaningful zero Ex = age, height, weight, BP, time |
| Interval Data | Equal difference between values, but without a meaningful zero Ex = Celsius and Fahrenheit temperature scales |
| Discrete (Categorical) Data | Data fits into a limited number of categories Two types: Nominal and Ordinal |
| Nominal Data | Categories are in an arbitrary order Ex = gender, ethnicity, marriage status |
| Ordinal Data | Categories are ranked in a logical order, but the difference between categories is not equal Ex = NYHA Functional Status, 0-10 pain scale |
| Characteristics of Gaussian Distribution | 68% of the values fall within 1 SD, 95% fall within 2 SDs of the mean |
| Type 1 and 2 Errors | Null Hypothesis is true AND accepted = correct conclusion Null Hypothesis is true AND rejected = Type 1 (false +) Null Hypothesis is false AND accepted = Type 2 (false -) Null Hypothesis is false AND rejected = correct conclusion |
| Risk | # of subjects in group with unfavorable event / total # of subs in group |
| Relative Risk | Risk in treatment group / risk in control group |
| Relationship between Relative Risk & Relative Risk Reduction | RR = AS likely (vs the control) RRR = LESS likely (vs the control) Therefore: RR + RRR = 100% |
| NNT/NNH | Use same formula: 1/(risk in control group - risk in tx group) OR 1/ARR **Always round UP NNT and round DOWN NNH** |
Created by:
skelly46
Popular Medical sets