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Table 2 Odds Ratios Predicting Smoking Status Change

From: Motivation rulers for smoking cessation: a prospective observational examination of construct and predictive validity

 

Overall Likelihood Ratio Test Chi Square1

Odds Ratio [95 % CI]:Continuous Smoking (0) versus Quit Attempt and Relapse (1)

Odds Ratio [95 % CI]: Continuous Smoking (0) versus Successful Change (1)

Step 1: Covariables Alone – Nagelkerke R2 = 0.10 (this step stayed the same for all 5 models)

Age

0.52

1.00 [0.98–1.02]

1.01 [0.98–1.05]

Sex (Male/Female)

6.69*

1.97* [1.16–3.36]

0.97 [0.40–2.38]

Educational Level (> HS/< HS)

2.10

1.20 [0.65–2.22]

0.55 [0.21–1.43]

Race (Nonwhite/White)

10.26**

0.41** [0.24–0.72]

0.67 [0.25–1.77]

Nicotine Dependence

7.76*

0.96 [0.81–1.13]

0.67** [0.50–0.90]

Model 1: Importance – Nagelkerke R2 = 0.14

 

Age

0.29

1.00 [0.98–1.02]

1.01 [0.98–1.05]

Sex (Male/Female)

7.89*

2.13** [1.24–3.68]

1.04 [0.42–2.58]

Educational Level (> HS/< HS)

2.13

1.33 [0.72–2.46]

0.62 [0.24–1.64]

Race (Nonwhite/White)

7.46*

0.46** [0.26–0.81]

0.76 [0.28–2.02]

Nicotine Dependence

6.58*

0.99 [0.83–1.17]

0.69* [0.51–0.93]

Importance

12.22**

1.17** [1.06–1.29]

1.18† [0.98–1.43]

Model 2: Readiness – Nagelkerke R2 = 0.13

 

Age

0.26

1.00 [0.85–1.20]

1.01 [0.97–1.04]

Sex (Male/Female)

7.38*

2.07** [1.20–3.56]

0.99 [0.40–2.44]

Educational Level (> HS/< HS)

2.47

1.37 [0.73–2.55]

0.61 [0.23–1.59]

Race (Nonwhite/White)

8.64*

0.44** [0.25–0.77]

0.69 [0.26–1.83]

Nicotine Dependence

6.33*

1.01 [0.85–1.20]

0.69* [0.51–0.94]

Readiness

9.23*

1.13** [1.04–1.23]

1.09 [0.94–1.27]

Model 3: Confidence – Nagelkerke R2 = 0.13

 

Age

0.05

1.00 [0.98–1.02]

1.00 [0.97–1.04]

Sex (Male/Female)

7.37*

2.06** [1.20–3.54]

1.01 [0.41–2.51]

Educational Level (> HS/< HS)

2.16

1.28 [0.69–2.38]

0.59 [0.22–1.55]

Race (Nonwhite/White)

7.79*

0.46** [0.26–0.80]

0.79 [0.30–2.13]

Nicotine Dependence

4.59

1.01 [0.85–1.20]

0.73* [0.54–0.99]

Confidence

10.78**

1.10* [1.02–1.19]

1.21* [1.04–1.39]

Model 4: Motivation Rulers Combined – Nagelkerke R2 = 0.16

 

Age

0.20

1.00 [0.98–1.02]

1.01 [0.97–1.04]

Sex (Male/Female)

7.94*

2.15** [1.24–3.72]

1.07 [0.43–2.71]

Educational Level (> HS/< HS)

2.73

1.37 [0.74–2.55]

0.57 [0.21–1.53]

Race (Nonwhite/White)

6.98*

0.47* [0.27–0.83]

0.84 [0.31–2.28]

Nicotine Dependence

4.88†

1.01 [0.85–1.20]

0.72* [0.53–0.98]

Importance

4.22

1.11† [0.98–1.26]

1.16 [0.93–1.44]

Readiness

2.21

1.04 [0.92–1.19]

0.87 [0.70–1.09]

Confidence

5.48†

1.03 [0.93–1.15]

1.24* [1.03–1.53]

Model 5: Stage of change – Nagelkerke R2 = 0.20

 

Age

0.00

1.00 [0.98–1.02]

1.00 [0.96–1.04]

Sex (Male/Female)

4.72†

1.81* [1.04–3.15]

0.99 [0.37–2.62]

Educational Level (> HS/< HS)

2.84

1.26 [0.66–2.35]

0.48 [0.17–1.34]

Race (Nonwhite/White)

8.87*

0.43** [0.24–0.76]

0.88 [0.32–2.47]

Nicotine Dependence

5.40†

1.01 [0.85–1.20]

0.69* [0.50–0.96]

Contemplation2

10.43**

2.50** [1.36–4.59]

0.46 [0.09–2.41]

Preparation2

18.81***

3.06** [1.52–6.15]

6.49** [2.20–19.12]

  1. *p < 0.05, **p < 0.01, † p < 0.10. 1All of the likelihood ratio tests performed had two degrees of freedom. 2Stage of change was dummy coded, with precontemplation as the reference category.
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Addiction Science & Clinical Practice

ISSN: 1940-0640