Table 1 Methodological characteristics of the surveys
National Household Sample Surveys (PNAD) | National Health Survey (PNS) | |||
|---|---|---|---|---|
1998 | 2003 | 2008 | 2013 | |
Number of individuals | 344,975 | 384,834 | 391,868 | 205,546 |
Number of households | 112,434 | 133,255 | 150,591 | 81,767 selected 62,986 interviewed |
Number of cities | 793 | 851 | 851 | 6069 Primary Sample Units (PSU) |
Data collection period | September 1998 | September 2003 | September 2008 | July 2013 |
Sampling method | Random sampling of conglomerates | Random sampling of conglomerates | Random sampling of conglomerates | Random sampling of conglomerates |