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The Validity of hEtG Stratified by the Use of Hair Products
| Hair products | Sensitivity of hEtG (%) (95% CI) |
Specificity of hEtG (%) (95% CI) |
|---|---|---|
| Hair product usage | ||
| None | 26.1 (10.2, 48.4) | 89.7 (72.7, 97.8) |
| Hair coloring and/or chemicals | 10.5 (1.3, 33.1) | 78.6 (49.2, 95.3) |
| Shampooing frequency | ||
| < once per day | 22.2 (6.4, 47.6) | 89.5 (66.9, 98.7) |
| ≥ once per day | 16.7 (4.7, 37.4) | 83.3 (62.6, 95.3) |
