• Data reference period
• Geographic localization (NUTS - 2001)

• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).
• RESIDENT POPULATION:  The persons who regardless of the fact that at the moment of observation ' 0:00 a.m. of the reference day ' are present or absent in a given housing unit, this unit being where they live during most of the year with their family, or where they have all or most of their belongings.

IPC = (1 + CV*Factor1)/(1 + CV*FACT1Pond)*100

Where: CV = Coefficient of variation chosen;
Factor1 = Values of the 1st factor extracted from the model;

FACT1Pond = Value resulting from the sum for all municipalities [Sum(Factor1)*(population weight)].