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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Drug Alcohol Depend. 2018 Feb 6;185:127–132. doi: 10.1016/j.drugalcdep.2017.12.013

Table 3.

Regression Models for Quitting Cigarette Smoking and rs16969968 Regressed on Lifetime FTND and Birth Cohort Before and After Adjusting for Measurement Non-Invariance.

Baseline1 Model Invariance Adjusted Model
Model Parameter β (S.E.) OR 95% CI β (S.E.) OR 95% CI
Quit Smoking (Logistic Model) FTND −0.74 (0.01)*** 0.48 0.40–0.44 −0.74 (0.01)*** 0.48 0.40–0.44
Cohort <1945 −0.30 (0.05)*** 0.74 0.34–0.56 −0.31 (0.05)*** 0.73 0.34–0.56
Cohort >1975 −0.42 (0.05)*** 0.67 0.23–0.40 −0.42 (0.05)*** 0.67 0.23–0.40
Chi-Square (d.f.) 1002.87 (48)*** N/A N/A 978.89 (44)*** N/A N/A
CFI 0.960 N/A N/A 0.961 N/A N/A
RMSEA 0.062 N/A N/A 0.064 N/A N/A
Additive rs16969968 genotype (Linear Model) FTND −0.09 (0.02)*** N/A −0.16–0.07 −0.09 (0.02)*** N/A −0.16–0.07
Cohort <1945 0.01 (0.04) N/A −0.07–0.11 0.01 (0.04) N/A −0.20–0.26
Cohort >1975 0.02 (0.04) N/A −0.11–0.07 0.02 (0.04) N/A −0.30–0.19
Chi-Square (d.f.) 871.045 (48)*** N/A N/A 849.23 (44)*** N/A N/A
CFI 0.060 N/A N/A 0.062 N/A N/A
RMSEA 0.954 N/A N/A 0.955 N/A N/A

N/A, not applicable. All models controlled for study sample, sex, and race. Birth cohort 1945–1975 was used as reference.

*

p<0.05,

**

p<0.01,

***

p<0.001.

1

The baseline model is unadjusted for measurement invariance.