Cost-effectiveness analysis
An economic evaluation was performed to estimate the cost of each strategy. It was calculated taking into consideration the actual number of calls, the time dedicated to each call, the number of letters sent, and the time dedicated to sending them. The cost per minute of each call, together with the cost of the administrative staff making the calls was obtained from our Hospital Administrative Department (Supplementary Table 3, For cost-effectiveness analysis, a Markov model was designed with a time horizon of 10 years. Cost assessment was performed from the perspective of the Spanish National Health Service, considering direct health costs in both strategies as described.