The DATE when a Cancer Treatment Period is started.

The CANCER TREATMENT PERIOD START DATE will be either:

• the DECISION TO TREAT DATE  - the DATE that a PATIENT agrees a treatment plan for either first or subsequent treatments within a Cancer Care Plan.  An individual PATIENT may have multiple DECISION TO TREAT DATES; or

• the EARLIEST CLINICALLY APPROPRIATE DATE - where there is no new DECISION TO TREAT DATE, but there has been a previously agreed and clinically appropriate period of delay.  In this case the subsequent ACTIVITY may not be the final treatment, but could be the next APPOINTMENT which deals with the planning of subsequent treatments.

This attribute is also known by these names:

Context	Alias
plural	CANCER TREATMENT PERIOD START DATES