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Table 4 Marginal effects from sex-stratified fixed-effects ordered probit regression models of the impact of state tobacco control policies on the number of days/month used smokeless tobacco or cigars (N = 499,381)

From: Impact of tobacco control policies on adolescent smokeless tobacco and cigar use: a difference-in-differences approach

 

Number of days/month

smokeless tobacco used

Number of days/month

cigars used

 

Mean

%a Use

Marginal effect of coefficientb,c

95% CI

p Value

Mean

%a Use

Marginal effect of coefficientb,d

95% CI

p Value

Males (N = 240,733)

  0 days

87.7%

     

  1-5 days

5.3%

  

11.6%

  

  6-29 days

3.6%

  

3.6%

  

  30 days

3.4%

  

1.6%

  

 Tobacco tax (%)

  0 days

 

−0.0001 (−0.0003 − 0.0001)

.4

 

-0.0001 (−0.0004-0.0002)

.4

  1-5 days

 

0.0000 (−0.0000-0.0001)

.4

 

0.0001 (−0.0001-0.0002)

.4

  6-29 days

 

0.0000 (−0.0000-0.0001)

.4

 

0.0000 (−0.0000-0.0003)

.4

  30 days

 

0.0000 (−0.0000-0.0001)

.4

 

0.0000 (−0.0000-0.0001)

.4

 Cigarette tax (%)

  0 days

 

−0.0010 (− 0.0017--0.0002)

.01

 

−0.0015 (− 0.0023--0.0006)

<.001

  1-5 days

 

0.0004 (0.0001-0.0006)

.01

 

0.0009 (0.0004-0.0014)

<.001

  6-29 days

 

0.0003 (0.0001-0.0005)

.01

 

0.0003 (0.0002-0.0005)

<.001

  30 days

 

0.0003 (0.0001-0.0006)

.01

 

0.0002 (0.0001-0.0003)

<.001

 100% smoke-free restaurants (yes/no)

  0 days

 

−0.0099 (−0.0189-0.0009)

.03

 

0.0047 (−0.0041-0.0136)

.3

  1-5 days

 

0.0036 (0.0003-0.0069)

.03

 

−0.0029 (− 0.0008-0.0025)

.3

  6-29 days

 

0.0028 (0.0003-0.0053)

.03

 

−0.0011 (− 0.0003-0.0010)

.3

  30 days

 

0.0035 (0.0003-0.0067)

.03

 

−0.0007 (− 0.0020-0.0006)

.3

Females (N = 258,648)

  0 days

98.0%

   

92.3%

   

  1-5 days

1.4%

   

5.9%

   

  6-29 days

0.3%

   

1.4%

   

  30 days

0.2%

   

0.5%

   

 Tobacco tax (%)

  0 days

 

0.0001 (−0.0000-0.0001)

.1

 

−0.0002 (−0.0004-0.0001)

.2

  1-5 days

 

−0.0000 (− 0.0000 − 0.0000)

.1

 

0.0001 (− 0.0001-0.0003)

.2

  6-29 days

 

−0.0000 (− 0.0000-0.0000)

.1

 

0.0000 (−0.0000 − 0.0003)

.2

  30 days

 

-0.0000 (−0.0000-0.0000)

.1

 

0.0000 (−0.0000-0.0001)

.2

 Cigarette tax (%)

  0 days

 

-0.0003 (−0.0006-0.0000)

.05

 

−0.0008 (− 0.0014--0.0002)

.007

  1-5 days

 

0.0002 (−0.0000 − 0.0004)

.05

 

0.0005 (0.0001-0.0009)

.007

  6-29 days

 

0.0001 (−0.0000-0.0001)

.05

 

0.0002 (0.0000-0.0003)

.007

  30 days

 

0.0001 (−0.0000-0.0001)

.05

 

0.0001 (0.0000-0.0002)

.007

 100% smoke-free restaurants (yes/no)

  0 days

 

-0.0004 (−0.0048-0.0039)

.8

 

0.0011 (−0.0054-0.0075)

.7

  1-5 days

 

0.0003 (−0.0025-0.0030)

.8

 

−0.0007 (− 0.0048-0.0034)

.7

  6-29 days

 

0.0001 (−0.0008-0.0009)

.8

 

−0.0002 (− 0.0017-0.0012)

.7

  30 days

 

0.0001 (−0.0006-0.0008)

.8

 

−0.0001 (− 0.0010-0.0007)

.7

  1. CI confidence interval
  2. a Weighted
  3. b Model includes adjustment for the following covariates: cigarette use, state tobacco control expenditure, age, race, state, and year
  4. c Model includes adjustment for cigar use
  5. d Model includes adjustment for smokeless tobacco use