Table 1.
Variables included in the multivariate regression analyses
| Variables | Description | Question One | Question Two |
|---|---|---|---|
| Dependent Variables | |||
| Quitline call volume | Natural log of the number of weekly calls to the quitline toll-free number as recorded in telephone service call records | X | X |
| Web program registrations | Natural log of the number of weekly online registrations for the web cessation program | X | X |
| Independent Variables | |||
| Television and radio TRPs | Sum of weekly TRPs for television and radio cessation ads, secondhand smoke ads, and smoke-free law ads | X | |
| Cessation TV campaign | A binary variable for each week indicating if there was television advertising for the cessation campaign | X | |
| Cessation print campaign | A binary variable for each week indicating if there was print advertising for the cessation campaign | X | |
| Cessation radio campaign | A binary variable for each week indicating if there was radio advertising for the cessation campaign | X | |
| Cessation online campaign | A binary variable for each week indicating if there was online advertising for the cessation campaign | X | |
| Cessation out-of-home campaign | A binary variable for each week indicating if there was out-of-home advertising for the cessation campaign | X | |
| Cessation other campaign | A binary variable for each week indicating if there was other advertising for the cessation campaign | X | |
| Secondhand smoke TV campaign | A binary variable for each week indicating if there was TV advertising for the secondhand smoke campaign | X | |
| Secondhand smoke print campaign | A binary variable for each week indicating if there was print advertising for the secondhand smoke campaign | X | |
| Secondhand smoke radio campaign | A binary variable for each week indicating if there was radio advertising for the secondhand smoke campaign | X | |
| Secondhand smoke online campaign | A binary variable for each week indicating if there was online advertising for the secondhand smoke campaign | X | |
| Secondhand smoke out-of-home campaign | A binary variable for each week indicating if there was out-of-home advertising for the secondhand smoke campaign | X | |
| Secondhand smoke other campaign | A binary variable for each week indicating if there was other advertising for the secondhand smoke campaign | X | |
| Smoke-free law TV campaign | A binary variable for each week indicating if there was TV advertising for the smoke-free law campaign | X | |
| Smoke-free law restroom campaign | A binary variable for each week indicating if there was restroom advertising for the smoke-free law campaign | X | |
| Smoke-free law radio campaign | A binary variable for each week indicating if there was radio advertising for the smoke-free law campaign | X | |
| Covariates | |||
| Week | Week number; included to account for the linear trend in the data | X | X |
| Previous week's call volume | A one week lag of the natural log of number of calls; included to account for week-to-week correlation in the residuals | X | X |
| Previous week's web registrations | A one week lag of the natural log of number of web registrants; included to account for week-to-week correlation in the residuals | X | X |
| Gas Price | Four-week moving average of gas price; included as a measure of economic stress | X | X |
| Health Impact Fee | 75 cents increase in the cost of cigarettes (August 1, 2005); a binary variable coded 1 the week of 7/31/2005 (Peter Jenning's death coincides with Health Impact Fee) | X | X |
| Quit To Live | ABC News month long special Quitting to Live: Fighting Lung Cancer - promotes 1-800-QUIT-NOW; a binary variable coded 1 the weeks of 10/30/2005 through 11/27/2005 | X | X |
| Big Butt Billboard | Big Butt spectacular billboard launches; a binary variable coded 1 the weeks of 11/27/2005 through 12/25/2005 | X | X |
| Freedom To Breathe legislative session | Freedom to Breathe (statewide smoke free law) legislation session debates (Nov. 2006 - June 2007); a binary variable coded 1 the weeks of 10/29/2006 through 6/24/2007 | X | X |
| Freedom To Breathe Law | Freedom to Breathe signed into law (May 16, 07); a binary variable coded 1 the week of 5/13/2007 | X | X |
| Age Progression Software | Launched age-progression software a binary variable coded 1 the week of 06/24/2007 | X | X |
| Freedom To Breathe Implementation | Freedom to Breathe implements (October 1, 2007); a binary variable coded 1 the week of 9/30/2007 | X | X |
| Great American Smokeout | Great American Smokeout (third Thursday of November - every year); a binary variable coded 1 the weeks of 11/13/2005, 11/12/2006, and 11/11/2007 | X | X |
| New Year's Resolutions | New Year resolution; a binary variable coded 1 the weeks of 1/1/2006, 12/31/2006, and 12/30/2007 | X | X |
| Minnesota State Fair Booth | QUITPLAN Services booth at the Minnesota State Fair; a binary variable coded 1 the weeks of 8/21/05-9/4/05, 8/20/06-9/3/06, and 8/19/07-9/2/07 | X | X |