Table 4.
Overview of the period of use of toothbrush (TB) samples, the age of the users, and storage conditions from different households in North Rhine-Westphalia (Germany).
| Sample | Period of Use | User Age | Storage | Sample | Period of Use | User Age | Storage |
|---|---|---|---|---|---|---|---|
| TB1 | 4–12 weeks | 20–60 | upright | TB14 | <2 weeks | 10–20 | upright |
| TB2 | 4–12 weeks | 20–60 | upright | TB15 | <2 weeks | 20–60 | upright |
| TB3 | 4–12 weeks | 20–60 | upright | TB16 | <2 weeks | 10–20 | upright |
| TB4 | 2–4 weeks | 20–60 | upright | TB17 | 2–4 weeks | 10–20 | horizontal |
| TB5 | 4–12 weeks | 20–60 | upright | TB18 | 2–4 weeks | 20–60 | horizontal |
| TB6 | <2 weeks | 20–60 | upright | TB19 | <2 weeks | 20–60 | upright |
| TB7 | 2–4 weeks | 20–60 | upright | TB20 | 2–4 weeks | 10–20 | upright |
| TB8 | 4–12 weeks | >60 | upright | TB21 | >12 weeks | 20–60 | horizontal |
| TB9 | 4–12 weeks | >60 | horizontal | TB22 | >12 weeks | 20–60 | horizontal |
| TB10 | 4–12 weeks | >60 | upright | TB23 | 4–12 weeks | 20–60 | upright |
| TB11 | 4–12 weeks | >60 | upright | TB24 | 4–12 weeks | 20–60 | upright |
| TB12 | 4–12 weeks | 20–60 | upright | TB25 | <2 weeks | 20–60 | upright |
| TB13 | 2–4 weeks | 10–20 | upright |