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Archived Comments for: External review and validation of the Swedish national inpatient register

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  1. The Swedish ICD-8 was introduced in 1969

    Jonas Ludvigsson, Karolinska University Hospital, Karolinska Institute

    22 October 2012

    This is to inform the readers of this paper that there is an error in Figure 1. The Swedish ICD-8 classification ("Klassifikation av sjukdomar 1968") was PUBLISHED in 1968, but ICD-8 per se was INTRODUCED in 1969. Hence, ICD-7 was used throughout year 1968, and ICD-8 was used from 1969. See also: Björn Smedby, Gunnar Schiöler: Health Classifications in the Nordic countries. Historic development in a national and international perspective. NOMESCO, Copenhagen 2006. Jonas F Ludvigsson Corresponding author.

    Competing interests