Figure 1

Scatter plots of mean number of days with a prescription versus mean number of days with a diagnosis by practice in the DIN and GPRD birth cohorts (minimum 25 children per practice) Top figure – (a) DIN: Mean number of days with a prescription issued vs. diagnostic code (without linkage, n = 140). Middle figure – (b) DIN: Mean number of days with a prescription issued vs. diagnostic or linked diagnostic code (n = 140). Bottom figure – (c) GPRD: Mean number of days with a prescription issued vs. diagnostic code (n = 437)