Participants will be submitted to the educational intervention with in situ simulation every 8 months.

Participants will be submitted to the educational intervention with in situ simulation every 4 months.

Participants will be submitted to the educational intervention with in situ simulation every 2 months.

The simulation scenarios were constructed using the service environment, with real equipment and materials and a low fidelity mannequin. The interventions were not filmed, and the clinical cases elaborated were fictitious, with clear objectives and developed according to the context of the unit. The simulations took place during the working hours of the participants, with the expected duration of the 10 minutes (average) for the scenario, and the average duration of the debriefing was 10 minutes, which took place immediately after the simulation and in the same location of the scenario.

Measurement of the average/median/standard deviation of hits in the questions of the knowledge test, in each group (A, B, C,). This measurement was performed in two moments:

• Pre and post initial intervention: measure performed to evaluate the impact of the initial intervention on the participants' knowledge about the issue.
• After simulation intervention: measurement performed to evaluate the impact of the simulation intervention on the maintenance of knowledge, according to the periodicity group of intervention where the participant was allocated.

The measurement was applied to all groups at the same moments. The following tests were used to make comparisons among groups: Wilcoxon Test; Estimate of the size of the Cohen's d effect (paired data); Kruskal-Wallis Test - Dunn's Post Hoc; Cohen's d: Effect size measures by the " Cohen's d" method complemented by the Confidence Interval 95%.

To compare, among groups exposed to the periodicity of different interventions, the average/median/standard deviation of hits in the accomplishment of a set of skills that matches the CPR procedures. Group A was evaluated when receiving the intervention every eight months, group B every four months, and group C every two months.

The Kruskal-Wallis Test was applied to compare the significance of the average outcomes among groups.

To Measure the average/median/standard deviation, referring to the agreement level of preparation for the accomplishment of CPR, in order to check the impact of the intervention performed according to the periodicity of application.

The following tests were used to make comparisons among groups: Wilcoxon Test; Estimate of the size of the Cohen's d effect (paired data); Kruskal-Wallis Test - Dunn's Post Hoc; Cohen's d: Effect size measures by the "Cohen's d" method complemented by the Confidence Interval 95%.