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Fig. 2 | BMC Medical Research Methodology

Fig. 2

From: Development and validation of algorithms to classify type 1 and 2 diabetes according to age at diagnosis using electronic health records

Fig. 2

Sensitivity and positive predictive value of the 4 best single algorithms for classifying type 1 diabetes in the derivation cohort by age at diagnosis*, displayed with the proportion of all diabetes cases classified as type 1 using the reference standard (dashed line). Algorithms: (a) ratio of type 1 to type 2 codes ≥ 0.5; (b) ratio of type 1 to type 2 codes ≥ 4; (c) at least 1 insulin prescription within 90 days of diagnosis; (d) multiple daily injections with no other glucose-lowering medication prescriptions

*smoothed using 15-year moving averages

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