Table 2.
Agreement between PEth and self-reported drinking status, by wave
| Self-reported hazardous drinking | Kappa | Self-reported any drinking | Kappa | |||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Yes | No | Yes | No | |||
| Drinking status by PEth | ||||||
| 50ng/ml as cut-off | ||||||
|
|
||||||
| PEth at baseline | ||||||
| ≥50ng/ml (Yes) | 46(23.7) | - | 46(23.7) | - | ||
| <50ng/ml (No) | 148(76.3) | - | 148(76.3) | - | ||
| PEth at 2 month | ||||||
| ≥50ng/ml (Yes) | 34(32.1) | 12(15.6) | 40(27.6) | 4(12.1) | ||
| <50ng/ml (No) | 72(67.9) | 65(84.4) | .149* | 105(72.4) | 29(87.9) | .071 |
| PEth at 7 month | ||||||
| ≥50ng/ml (Yes) | 23(58.9) | 26(23.8) | 33(38.8) | 16(20.0) | ||
| <50ng/ml (No) | 33(41.1) | 83(76.2) | .178* | 52(61.2) | 64(80.0) | .186** |
| 8ng/ml as cut-off | ||||||
|
|
||||||
| PEth at baseline | ||||||
| ≥8ng/ml (Yes) | 92(47.4) | - | 92(47.4) | - | ||
| <8ng/ml (No) | 102(52.6) | - | 102(52.6) | - | ||
| PEth at 2 month | ||||||
| ≥8ng/ml (Yes) | 58(54.7) | 27(35.1) | 72(49.7) | 9(27.3) | ||
| <8ng/ml (No) | 48(45.3) | 50(64.9) | .189** | 73(50.3) | 24(72.7) | .128* |
| PEth at 7 month | ||||||
| ≥8ng/ml (Yes) | 35(62.6) | 43(39.4) | 50(58.8) | 28(35.0) | ||
| <8ng/ml (No) | 21(37.4) | 66(60.6) | .210* | 35(41.2) | 52(65.0) | .238* |
Note.
*
p < .05.
**
p < .01.