For collection of information on Out-Patient data sets, the period of waiting for each PATIENT expressed as weeks waiting is required to be calculated in order to determine the appropriate waiting time band the PATIENT should be counted within.

The start point of the waiting period calculation is either the ORIGINAL REFERRAL REQUEST RECEIVED DATE or the FIRST ATTENDANCE EFFECTIVE WAIT START DATE which takes into consideration any PATIENT instigated resets.

The end point is either the ACTIVITY DATE of the Out-Patient Attendance Consultant CARE CONTACT when an attendance has taken place or the REPORTING PERIOD END DATE depending upon the criteria of the waiting time being calculated.

Subtract the number of days of the FIRST ATTENDANCE EFFECTIVE WAIT START DATE from the number of days of the ACTIVITY DATE or REPORTING PERIOD END DATE, this results in the number of days of the effective waiting time period.

The number of days is then divided by 7 to give the number of whole weeks. For example, if the number of days waiting is 49 then the number of weeks is 7 weeks, if the number of days waiting is 30 then the number of weeks is more than 4 weeks but less than 5 weeks time band.

This supporting information is also known by these names:

Context	Alias
plural	Out-Patient Effective Waiting Time Calculations