Table 2.
Descriptive and quality measures of 3 different measurement units to measure tattoo surface and coverage.
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Values, mean (SD) | Values, median (IQR) | P valuea | AA-ICCb | CA-ICCc | Kendall τ | |||||||
| Tattoo size (cm2) | |||||||||||||
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Hand surface (n=32) | <.001 | 0.71 | 0.85 | 0.72 | ||||||||
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Self-assessment | 1768 (1574) | 1324 (467-2589) |
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Validation | 930 (1047) | 403 (124-1550) |
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|
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Credit card (n=33) | .56 | 0.89 | 0.89 | 0.82 | ||||||||
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Self-assessment | 734 (1222) | 277 (185-716) |
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|
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Validation | 677 (1112) | 217 (93-487) |
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Body schemes (n=32) | <.001 | 0.64 | 0.82 | 0.69 | ||||||||
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Self-assessment | 2301 (2197) | 1531 (708-2450) |
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Validation | 923 (1334) | 310 (192-1123) |
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| Coverage (%) | |||||||||||||
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Hand surface (n=32) | .18 | 0.34 | 0.35 | 0.26 | ||||||||
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Self-assessment | 52 (23) | 51 (39-66) |
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Validation | 46 (20) | 46 (25-63) |
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Credit card (n=33) | .05 | 0.70 | 0.72 | 0.59 | ||||||||
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Self-assessment | 50 (28) | 52 (26-69) |
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Validation | 44 (21) | 45 (29-61) |
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Body schemes (n=32) | .47 | 0.67 | 0.67 | 0.52 | ||||||||
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Self-assessment | 52 (21) | 52 (41-68) |
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Validation | 50 (21) | 50 (34-67) |
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aP values calculated via 2-tailed t tests for dependent samples.
bAA-ICC: absolute agreement intraclass correlation coefficient.
cCA-ICC: consistency of agreement intraclass correlation coefficient.