Table 1.
Factor Analysis and Item Response Theory for Current Drinkers, N =1,066
| Alcohol Criteria1 | Prevalence % | Factor loadings |
Item Response Theory Parameters | |
|---|---|---|---|---|
| Discrimination (s.e.) | Severity (s.e.) | |||
| Dependence | ||||
| Tolerance | 19.9 | 0.786 | 1.364 (0.16) | 1.066 (0.07) |
| Withdrawal | 6.9 | 0.729 | 1.239 (0.16) | 1.946 (0.14) |
| Larger/Longer | 15.9 | 0.826 | 1.600 (0.20) | 1.201 (0.07) |
| Quit/Control | 8.4 | 0.661 | 1.003 (0.12) | 1.987 (0.15) |
| Time Spent | 4.1 | 0.751 | 1.349 (0.19) | 2.199 (0.16) |
| Activities Given Up | 0.9 | 0.845 | 2.011 (0.45) | 2.624 (0.22) |
| Physical/Psychological | 8.3 | 0.652 | 0.900 (0.12) | 2.114 (0.18) |
| Abuse | ||||
| Neglect Roles | 1.4 | 0.846 | 1.920 (0.49) | 2.481 (0.21) |
| Hazardous Use | 8.0 | 0.667 | 0.999 (0.13) | 2.028 (0.16) |
| Legal Problems | 0.4 | 0.641 | 1.239 (0.35) | 3.606 (0.62) |
| Social/Interpersonal | 2.7 | 0.856 | 1.881 (0.36) | 2.190 (0.15) |
| Weekly at-risk Drinking2 | 10.5 | 0.719 | 1.081 (0.13) | 1.735 (0.12) |
| Model Fit Indices3 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Factor Analysis | Item Response Theory | |||||||
| DSM-IV criteria |
Without Legal problems |
Including Weekly at-risk Drinking |
DSM-IV criteria |
Legal Problems, constrained |
Weekly at-risk Drinking, free |
Weekly at-risk Drinking, constrained |
||
| CFI4 | 0.995 | 0.992 | 0.993 | AIC5 | 4486.272 | 4496.449 | 5059.029 | 5204.780 |
| TLI4 | 0.995 | 0.993 | 0.994 | BIC5 | 4595.648 | 4600.854 | 5178.349 | 5319.129 |
| RMSEA5 | 0.015 | 0.019 | 0.016 | SS-BIC5 | 4525.772 | 4534.154 | 5102.121 | 5246.077 |
Description of DSM-IV criteria (American Psychiatric Association, 1994)
Tolerance: diminished effect or need more to get desired effect
Withdrawal: withdrawal syndrome or alcohol or related substance taken to prevent or relieve symptoms
Larger/longer: drinking more or for longer then wanted to
Quit/control: wanted to stop or drink less, or unsuccessful attempts
Time spent: spent a lot of time getting alcohol, drinking, or recovering from drinking
Activities given up: gave up important activities to drink
Physical/psychological: continued drinking despite knowledge that it caused or exacerbated a physical or psychological problem
Neglect roles: drinking caused failure to conduct work, home, or school obligations
Hazardous use: drinking that incurred danger, e.g., driving
Legal problems: legal problems due to drinking
Social/interpersonal: drinking despite knowledge that it caused or exacerbated social or interpersonal problems
Weekly at-risk drinking: weekly or more frequent consumption of 5 or more drinks per occasion for men, 4 or more for women
CFI = Comparative Fit Index, TLI= Tucker-Lewis Index, RMSEA= root mean square error of approximation, AIC= Akaike Information Criterion, BIC= Bayesian Information Criterion, SS-BIC= sample-size corrected BIC
Larger value indicates better model fit
Smaller value indicates better model fit