Final answer:
Effective discharge teaching is indicated by the patient understanding the need for a follow-up chest x-ray to ensure pneumonia resolution, along with maintaining general health practices.
Step-by-step explanation:
The nurse can evaluate that discharge teaching for a patient hospitalized with pneumonia has been effective when the patient states they understand the importance of having a follow-up chest x-ray. This procedure is typically performed 6 to 8 weeks after initial treatment to ensure the pneumonia has resolved.
In addition to medical checks, preventative measures include staying well-rested, not smoking, eating healthily, and engaging in regular exercise to maintain a strong immune system and respiratory health.