| CFPS | China Family Panel Studies |
| WHO | World Health Organization |
| FCTC | Framework Convention on Tobacco Control |
| NHS | National Health Service |
| ORs | Odds Ratios |
| RRs | Risk Ratios |
| CIs | Confidence Intervals |
| pp | percentage points |
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.