Publication output in telemedicine in Spain.

We searched the MEDLINE database for publications about telemedicine from 1966 to 2003. Only publications with a first institutional address in Spain and from journals listed in the JCR Science Edition 2002 were included in the study. A total of 118 publications were found. The first publication appeared in 1988 and publication output showed a sudden increase starting in 1995, reaching a maximum in 2002 with 21 publications. The number of authors per publication in non-multicentre studies ranged from 1 to 14 (median 6.5). Most authors (79%) contributed to only a single publication; 10% of authors participated in three or more publications. Most publications were full papers (88%). The most active Autonomous Community in the number of publications relative to inhabitants was Galicia (0.91 publications per 100,000 inhabitants). The Community that produced the highest absolute number of publications was Madrid (29% of the total). The mean impact factor of the journals in which the publications appeared was 0.961. Production of telemedicine publications in Spain has followed the same temporal course as has been observed worldwide. There is an unequal geographical and institutional distribution of publications. The highest production is concentrated in a few institutions and only a small number of authors show steady research activity.