Figure 4From: Validity of registration of ICD codes and prescriptions in a research database in Swedish primary care: a cross-sectional study in Skaraborg primary care database Correlation between coded visits and patients with correct diagnose and medication registration respectively. Correlation between frequencies of ICD coded visits during 2002-2003 and number of patients with correct registration of ICD code and medication for the 24 health care centres in Skaraborg. * Significant at < 0.01 level. On the X axis: Proportion of coded visits. On the Y axis: Number of patients with a correct combination of Prescription/ICD code registration respectively.Back to article page