Table 1

Intercorrelations Between Independent Variables (N = 5987)
Variables
 1
 2
 3
 4
 5
 6
 7
 8
1. Respondent age
 ---






2. Respondent sex
 -0.005
 ---





3. Ever smoked cigarettes
 0.115**
 0.092**
 ---




4. Number of cigarettes per day
 0.254**
 0.057**
 0.688**
 ---



5. Frequency of use (days per month)
 0.047**
 -0.021
 0.159**
 0.180**
 ---


6. Quarter ounces consumed per month
 -0.006
 -0.014
 0.159**
 0.238**
 0.600**
 ---

7. Usual intoxication intensity
 -0.310**
 -0.082**
 -0.048**
 -0.078**
 0.052**
 0.136**
 ---
8. Maximum intoxication intensity
 -0.424**
 -0.087**
 -0.021
 -0.086**
 0.195**
 0.168**
 0.629**
 ---

Note. **p < 0.01

Walden and Earleywine Harm Reduction Journal 2008 5:20   doi:10.1186/1477-7517-5-20

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