Scandinavian journal of Nordisk rettsmedisin and odontological age-estimation. The intra-and inter-observer errors are overall small (not shown). Other studies have found likewise low errors [63][64][65] did find a higher margin of intra-observer error among untrained observers versus a lower margin among trained radiologists (although not statistically significant). In our study we assessed the error between a radiologist and a non-radiologist (one of the authors) for 159 carpal X-rays in blind trials. We analysed the **data** following the procedure outlined by [52].