Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Recommended prefixes in variable names that encode data and variable type.
| Prefix | Data type | Prefix | Variable type |
|---|---|---|---|
| <> (no prefix) | scalar | n | number |
| v | vector | p | probability |
| m | matrix | r | rate |
| a | array | u | utility |
| df | data frame | c | cost |
| dtb | data table | hr | hazard ratio |
| l | list | rr | relative risk |
| ly | life years | ||
| q | QALYs | ||
| se | standard error |
QALYs quality-adjusted life years
