Table 6.
Comparison of diameter of IDT injection wheal (Wi) after injection of saline (0.02 ml or 0.03 ml) by trained operators using the standardized method and syringe size used.
| Groningen | Firenze | Porto | Nancy | Malaga | Munich | Total | |
|---|---|---|---|---|---|---|---|
| Number of volunteers | 23 | 11 | 10 | 15 | 10 | 8 | 77 |
| Mean age | 44 | 44 | 34 | 30 | 48 | 30 | 30 |
| Site (p = 0.4735) | |||||||
| UA (N) | 0 | 0 | 0 | 30 | 0 | 0 | 30 |
| FA (N) | 46 | 22 | 20 | 0 | 20 | 16 | 124 |
| Wi diameter (mm) with injection volume (ml) | |||||||
| 0.02 ml | 5 (3–6) | 5 (4–7) | 5 (4–6) | 5 (5–6) | 6 (5–7) | 5 (5–8) | 5 (3–8) |
| 0.03 ml | 6 (3–6) | 6 (5–8) | 6 (6–7) | 6 (6–6) | 7 (6–8) | 7 (6–7) | 6 (3–8) |
| Syringe size (ml) | |||||||
| 0.5 ml (n) | 46 | 0 | 20 | 0 | 0 | 0 | 66 |
| 1 ml (n) | 0 | 22 | 0 | 30 | 20 | 16 | 88 |
N, number of test; M, median; R, range; SD, standard deviation; UA, Upper arm; FA, Forearm; IQR, interquartile range; No difference of Wi according to the site of injection (p = 0.4735).