Follow-up, with iterative outcome review, is the only way to ensure that best possible outcome is achieved. Failure to follow-up is a common reason for management failure.
It is often the case that health-care systems strongly discourage follow-up. This is counter-productive.
A validated measure of outcome should be applied to achieve best outcomes. The HURT questionnaire, one of the management aids developed by Lifting The Burden, expressly serves this purpose.