Table 1.
Characteristics of the CHART Study Sites Contributing Patients to the Pooled Analysis
| Study site and e-cigarette questiona | N | Hospital site | N | Period of enrollment | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 2011 | 2012 | 2013 | ||||||||||||||
| Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | ||||
| All | 4,660 | All | 4,660 | 21 | 67 | 62 | 48 | 156 | 314 | 519 | 542 | 446 | 393 | 685 | 654 | 557 | 196 |
| Boston, MA | 397 | Massachusetts General Hospital | 397 | X | X | X | X | X | X | X | X | ||||||
| Kansas City, KS | 1,054 | University of Kansas Medical Center | 873 | X | X | X | X | X | X | X | X | ||||||
| Stormont Vail Health Care | 181 | X | X | X | X | X | X | X | X | ||||||||
| New York, NY | 1,330 | Bellevue Hospital Center | 903 | X | X | X | X | X | X | X | X | X | X | ||||
| VA New York Harbor Healthcare System | 427 | X | X | X | X | X | X | X | X | X | |||||||
| Portland, OR | 900 | Kaiser Permanente SMC | 624 | X | X | X | X | X | X | X | X | X | |||||
| Oregon Health Sciences University Hospital | 81 | X | X | X | |||||||||||||
| Legacy Emmanuel Hospital | 195 | X | X | X | X | X | |||||||||||
| Birmingham, AL | 979 | UAB Hospital | 979 | X | X | X | X | ||||||||||
CHART = Consortium of Hospitals Advancing Research on Tobacco.
aQuestion about electronic cigarette used at each site:
New York, Massachusetts: In the past month, have you used the electronic cigarette (also called an e-cigarette?)
Kansas: In the past 30 days, on how many days did you smoke the electronic cigarette?
Alabama: In the past 30 days, have you used an electronic cigarette (also called an e-cigarette)?
Oregon: Did you use any other tobacco product besides cigarettes in the past 30 days (including electronic cigarettes)? What products did you use? (Mark yes or no for each item) Response categories included: Electronic cigarettes.