Table 3.
Estimates of tetrachoric within-person correlations (with standard errors and number of observations) for the CAGE as dichotomy (0 vs. 1+ yes answers)
| 15–17 | 18–20 | 21–23 | 24–26 | 27–29 | 30–32 | |
|---|---|---|---|---|---|---|
| 15–17 | 1 | |||||
| 18–20 | .43 (.07) N = 672 | 1 | ||||
| 21–23 | .41 (.08) N = 616 | .59 (.04) N = 1,224 | 1 | |||
| 24–26 | .38 (.08) N = 540 | .45 (.05) N = 1,125 | .65 (.03) N = 1,586 | 1 | ||
| 27–29 | .20 (.14) N = 289 | .47 (.06) N = 840 | .67 (.03) N = 1,270 | .75 (.03) N = 1,551 | 1 | |
| 30–32 | .29 (.14) N = 177 | .48 (.08) N = 455 | .63 (.04) N = 922 | .69 (.03) N = 1,147 | .73 (.03) N = 1,167 | 1 |