Table 6. Time lag for public availability of individual-level data from three major health surveys in India, 1992 to 2016.
| Survey | Data collection phase | Publicly available individual-level data | No. of months between data collection completion and publicly available individual-level data |
|---|---|---|---|
| NFHS | |||
| NFHS-1 | April 1992 to September 1993 | August 1995 | 22 |
| NFHS-2 | November 1998 to December 1999 | October 2000 | 9 |
| NFHS-3 | November 2005 to August 2006 | September 2007 | 12 |
| NFHS-4 | March 2015 onwards | Data being collected as of February 2016 | N/A |
| DLHS | |||
| DLHS-1 | May 1998 to October 1999 | August 2001 | 21 |
| DLHS-2 | March 2002 to June 2005 | August 2006 | 13 |
| DLHS-3 | December 2007 to December 2008 | April 2010 | 15 |
| DLHS-4 | August 2012 to February 2014 | December 2015 | 21 |
| AHS | |||
| AHS baseline | July 2010 to March 2011 | November 2015 | 55 |
| AHS 1st update | October 2011 to April 2012 | November 2015 | 42 |
| AHS 2nd update | November 2012 to May 2013 | November 2015 | 29 |
AHS: Annual Health Survey; DLHS: District Level Household Survey; N/A: not applicable; NFHS: National Family Health Survey.