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DOBFB is a 4-digit numeric variable.

Codes

9999 = NIU (not in universe)

Description

DOBFB reports the date of the first birth of the respondent in Century Month Code (CMC) format.

Century month codes (CMC) are particularly useful for checking the consistency of dates, calculating intervals between events, and imputing dates when the information for an event is missing or partially complete.

Century month codes (CMC) are calculated by multiplying by 12 the difference between the year of an event and 1900.

The month of the event is added to the previous result.

CMC = (Year minus 1900) * 12 + Month

For example, the CMC for June 2002 is:

CMC = (2002 minus 1900) * 12 + 6 = 1230

In other words, 1,230 months have elapsed between January 1900 and June 2002. Starting with CMC figures, one can calculate the month and year using the following formulas:

Year = int( ( CMC minus 1 )/12 ) + 1900
[int(x) is the integer part of x]
Month = CMC – ( ( Year minus1900 ) * 12 )

Comparability

Some samples restrict the universe to ever-married women.

Surveys of Thailand 2012 and 2015 (Bangkok) and Nepal 2014 and 2019 used non-standard calendars; they have been modified to be compatible with the other surveys in this variable.

Universe

  • Afghanistan 2010: Women age 15-49 who gave birth
  • Afghanistan 2022: Women age 15-49 who gave birth
  • Algeria 2018: Ever-married women age 15-49 who gave birth
  • Argentina 2011: Women age 15-49 who gave birth
  • Argentina 2019: Women age 15-49 who gave birth
  • Bangladesh 2012: Ever-married women age 15-49 who gave birth
  • Bangladesh 2019: Ever-married women age 15-49 who gave birth
  • Barbados 2012: Women age 15-49 who gave birth
  • Belize 2011: Women age 15-49 who gave birth
  • Belize 2015: Women age 15-49 who gave birth
  • Benin 2014: Women age 15-49 who gave birth
  • Benin 2021: Women age 15-49 who gave birth
  • Bhutan 2010: Women age 15-49 who gave birth
  • Bosnia and Herzegovina (Roma) 2011: Women age 15-49 who gave birth
  • Cameroon 2014: Women age 15-49 who gave birth
  • Central African Republic 2010: Women age 15-49 who gave birth
  • Central African Republic 2018: Women age 15-49 who gave birth
  • Chad 2010: Women age 15-49 who gave birth
  • Chad 2019: Women age 15-49 who gave birth
  • Comoros 2022: Women age 15-49 who gave birth
  • Congo 2014: Women age 15-49 who gave birth
  • Congo Democratic Republic 2010: Women age 15-49 who gave birth
  • Congo Democratic Republic 2017: Women age 15-49 who gave birth
  • Costa Rica 2018: Women age 15-49 who gave birth
  • Cuba 2010: Women age 15-49 who gave birth
  • Cuba 2014: Women age 15-49 who gave birth
  • Cuba 2019: Women age 15-49 who gave birth
  • Dominican Republic 2014: Women age 15-49 who gave birth
  • Dominican Republic 2019: Women age 15-49 who gave birth
  • Egypt 2013: Ever-married women age 15-49 who gave birth
  • El Salvador 2014: Women age 15-49 who gave birth
  • Eswatini (Swaziland) 2010: Women age 15-49 who have ever been pregnant who gave birth
  • Eswatini (Swaziland) 2014: Women age 15-49 who gave birth
  • Eswatini (Swaziland) 2021: Women age 15-49 who gave birth
  • Fiji 2021: Women age 15-49 who gave birth
  • Gambia 2010: Women age 15-49 who gave birth
  • Gambia 2018: Women age 15-49 who gave birth
  • Georgia 2018: Women age 15-49 who gave birth
  • Ghana (Accra) 2010: Women age 15-49 who gave birth
  • Ghana 2011: Women age 15-49 who gave birth
  • Ghana 2017: Women age 15-49 who gave birth
  • Guinea 2016: Women age 15-49 who gave birth
  • Guinea Bissau 2014: Women age 15-49 who gave birth
  • Guinea Bissau 2018: Women age 15-49 who gave birth
  • Guyana 2014: Women age 15-49 who gave birth
  • Guyana 2019: Women age 15-49 who gave birth
  • Honduras 2019: Women age 15-49 who gave birth
  • Indonesia (Papua) 2011: Women age 15-49 who gave birth
  • Indonesia (West Papua) 2011: Women age 15-49 who gave birth
  • Iraq 2011: Ever-married women age 15-49 who gave birth
  • Iraq 2018: Ever-married women age 15-49 who gave birth
  • Jamaica 2011: Women age 15-49 who gave birth
  • Kazakhstan 2010: Women age 15-49 who gave birth
  • Kazakhstan 2015: Women age 15-49 who gave birth
  • Kenya (Nyanza Province) 2011: Women age 15-49 who gave birth
  • Kenya (Bungoma) 2013: Women age 15-49 who gave birth
  • Kenya (Kakamega) 2013: Women age 15-49 who gave birth
  • Kenya (Turkana County) 2013: Women age 15-49 who gave birth
  • Kiribati 2018: Women age 15-49 who gave birth
  • Kosovo 2013: Women age 15-49 who gave birth
  • Kosovo (Roma) 2013: Women age 15-49 who gave birth
  • Kosovo 2019: Women age 15-49 who gave birth
  • Kosovo (Roma) 2019: Women age 15-49 who gave birth
  • Kyrgyzstan 2014: Women age 15-49 who gave birth
  • Kyrgyzstan 2018: Women age 15-49 who gave birth
  • Laos 2011: Women age 15-49 who gave birth
  • Laos 2017: Women age 15-49 who gave birth
  • Lebanon 2011: Ever-married women age 15-49 who gave birth
  • Lesotho 2018: Women age 15-49 who gave birth
  • Macedonia (Roma) 2011: Women age 15-49 who gave birth
  • Macedonia 2018: Women age 15-49 who gave birth
  • Macedonia (Roma) 2018: Women age 15-49 who gave birth
  • Madagascar 2012: Women age 15-49 who have ever been pregnant who gave birth
  • Madagascar 2018: Women age 15-49 who gave birth
  • Malawi 2013: Women age 15-49 who gave birth
  • Malawi 2019: Women age 15-49 who gave birth
  • Mali 2015: Women age 15-49 who gave birth
  • Mauritania 2011: Ever-married women age 15-49 who gave birth
  • Mauritania 2015: Women age 15-49 who gave birth
  • Mexico 2015: Women age 15-49 who gave birth
  • Moldova 2012: Women age 15-49 who gave birth
  • Mongolia 2010: Women age 15-49 who gave birth
  • Mongolia (Khuvsgul Aimag) 2012: Women age 15-49 who gave birth
  • Mongolia (Nalaikh) 2012: Women age 15-49 who gave birth
  • Mongolia 2013: Women age 15-49 who gave birth
  • Mongolia (Khuvsgul Aimag) 2016: Women age 15-49 who gave birth
  • Mongolia (Nalaikh) 2016: Women age 15-49 who gave birth
  • Mongolia 2018: Women age 15-49 who gave birth
  • Montenegro (Roma) 2013: Women age 15-49 who gave birth
  • Montenegro 2013: Women age 15-49 who gave birth
  • Montenegro 2018: Women age 15-49 who gave birth
  • Montenegro (Roma) 2018: Women age 15-49 who gave birth
  • Nepal 2014: Women age 15-49 who gave birth
  • Nepal 2019: Ever-married women age 15-49 who gave birth
  • Nigeria 2011: Women age 15-49 who gave birth
  • Nigeria 2016: Women age 15-49 who gave birth
  • Nigeria 2021: Women age 15-49 who gave birth
  • Pakistan (Balochistan) 2010: Ever-married women age 15-49 who gave birth
  • Pakistan (Punjab) 2011: Ever-married women age 15-49 who gave birth
  • Pakistan (Sindh) 2014: Ever-married women age 15-49 who gave birth
  • Pakistan (Punjab) 2014: Ever-married women age 15-49 who gave birth
  • Pakistan (Gilgit-Baltistan) 2016: Ever-married women age 15-49 who gave birth
  • Pakistan (Khyber Pakhtunkhwa) 2016: Ever-married women age 15-49 who gave birth
  • Pakistan (Punjab) 2017: Ever-married women age 15-49 who gave birth
  • Pakistan (Sindh) 2018: Ever-married women age 15-49 who gave birth
  • Pakistan (Balochistan) 2019: Ever-married women age 15-49 who gave birth
  • Pakistan (Khyber Pakhtunkhwa) 2019: Ever-married women age 15-49 who gave birth
  • Palestine 2010: Ever-married women age 15-54 who gave birth
  • Palestine 2014: Ever-married women age 15-49 who gave birth
  • Palestine 2019: Ever-married women age 15-49 who gave birth
  • Paraguay 2016: Women age 15-49 who gave birth
  • Saint Lucia 2012: Women age 15-49 who gave birth
  • Samoa 2019: Women age 15-49 who gave birth
  • Sao Tome and Principe 2014: Women age 15-49 who gave birth
  • Sao Tome and Principe 2019: Women age 15-49 who gave birth
  • Senegal (Dakar City) 2015: Women age 15-49 who gave birth
  • Serbia 2010: Women age 15-49 who gave birth
  • Serbia (Roma) 2010: Women age 15-49 who gave birth
  • Serbia 2014: Women age 15-49 who gave birth
  • Serbia (Roma) 2014: Women age 15-49 who gave birth
  • Serbia (Roma) 2019: Women age 15-49 who gave birth
  • Serbia 2019: Women age 15-49 who gave birth
  • Sierra Leone 2010: Women age 15-49 who gave birth
  • Sierra Leone 2017: Women age 15-49 who gave birth
  • Somalia (Somaliland) 2011: Ever-married women age 15-49 who gave birth
  • Somalia (Northeast Zone) 2011: Ever-married women age 15-49 who gave birth
  • South Sudan 2010: Ever-married women age 15-49 who gave birth
  • Sudan 2010: Ever-married women age 15-49 who gave birth
  • Sudan 2014: Ever-married women age 15-49 who gave birth
  • Suriname 2018: Women age 15-49 who gave birth
  • Thailand 2012: Women age 15-49 who gave birth
  • Thailand (Bangkok) 2015: Women age 15-49 who gave birth
  • Thailand (17 Provinces) 2019: Women age 15-49 who gave birth
  • Thailand 2019: Women age 15-49 who gave birth
  • Thailand 2022: Women age 15-49 who gave birth
  • Togo 2010: Women age 15-49 who gave birth
  • Togo 2017: Women age 15-49 who gave birth
  • Tonga 2019: Women age 15-49 who gave birth
  • Trinidad and Tobago 2011: Women age 15-49 who gave birth
  • Trinidad and Tobago 2022: Women age 15-49 who gave birth
  • Tunisia 2011: Ever-married women age 15-49 who gave birth
  • Tunisia 2018: Ever-married women age 15-49 who gave birth
  • Tunisia 2023: Ever-married women age 15-49 who gave birth
  • Turkmenistan 2015: Women age 15-49 who gave birth
  • Turkmenistan 2019: Women age 15-49 who gave birth
  • Turks and Caicos 2019: Women age 15-49 who gave birth
  • Tuvalu 2019: Women age 15-49 who gave birth
  • Ukraine 2012: Women age 15-49 who gave birth
  • Uzbekistan 2021: Women age 15-49 who gave birth
  • Vietnam 2010: Women age 15-49 who gave birth
  • Vietnam 2013: Women age 15-49 who gave birth
  • Vietnam 2020: Women age 15-49 who gave birth
  • Yemen 2022: Ever-married women age 15-49 who gave birth
  • Zimbabwe 2014: Women age 15-49 who gave birth
  • Zimbabwe 2019: Women age 15-49 who gave birth

Availability

  • Afghanistan: 2010, 2022
  • Algeria: 2018
  • Argentina: 2011, 2019
  • Bangladesh: 2012, 2019
  • Barbados: 2012
  • Belize: 2011, 2015
  • Benin: 2014, 2021
  • Bhutan: 2010
  • Bosnia and Herzegovina (Roma): 2011
  • Cameroon: 2014
  • Central African Republic: 2010, 2018
  • Chad: 2010, 2019
  • Comoros: 2022
  • Congo: 2014
  • Congo Democratic Republic: 2010, 2017
  • Costa Rica: 2018
  • Cuba: 2010, 2014, 2019
  • Dominican Republic: 2014, 2019
  • Egypt: 2013
  • El Salvador: 2014
  • Eswatini (Swaziland): 2010, 2014, 2021
  • Fiji: 2021
  • Gambia: 2010, 2018
  • Georgia: 2018
  • Ghana: 2011, 2017
  • Ghana (Accra): 2010
  • Guinea: 2016
  • Guinea Bissau: 2014, 2018
  • Guyana: 2014, 2019
  • Honduras: 2019
  • Indonesia (Papua): 2011
  • Indonesia (West Papua): 2011
  • Iraq: 2011, 2018
  • Jamaica: 2011
  • Kazakhstan: 2010, 2015
  • Kenya (Nyanza Province): 2011
  • Kenya (Bungoma): 2013
  • Kenya (Kakamega): 2013
  • Kenya (Turkana County): 2013
  • Kiribati: 2018
  • Kosovo: 2013, 2019
  • Kosovo (Roma): 2013, 2019
  • Kyrgyzstan: 2014, 2018
  • Laos: 2011, 2017
  • Lebanon: 2011
  • Lesotho: 2018
  • Macedonia: 2018
  • Macedonia (Roma): 2011, 2018
  • Madagascar: 2012, 2018
  • Malawi: 2013, 2019
  • Mali: 2015
  • Mauritania: 2011, 2015
  • Mexico: 2015
  • Moldova: 2012
  • Mongolia: 2010, 2013, 2018
  • Mongolia (Khuvsgul Aimag): 2012, 2016
  • Mongolia (Nalaikh): 2012, 2016
  • Montenegro: 2013, 2018
  • Montenegro (Roma): 2013, 2018
  • Nepal: 2014, 2019
  • Nigeria: 2011, 2016, 2021
  • Pakistan (Balochistan): 2010, 2019
  • Pakistan (Punjab): 2011, 2014, 2017
  • Pakistan (Sindh): 2014, 2018
  • Pakistan (Gilgit-Baltistan): 2016
  • Pakistan (Khyber Pakhtunkhwa): 2016, 2019
  • Palestine: 2010, 2014, 2019
  • Paraguay: 2016
  • Saint Lucia: 2012
  • Samoa: 2019
  • Sao Tome and Principe: 2014, 2019
  • Senegal (Dakar City): 2015
  • Serbia: 2010, 2014, 2019
  • Serbia (Roma): 2010, 2014, 2019
  • Sierra Leone: 2010, 2017
  • Somalia (Northeast Zone): 2011
  • Somalia (Somaliland): 2011
  • South Sudan: 2010
  • Sudan: 2010, 2014
  • Suriname: 2018
  • Thailand: 2012, 2019, 2022
  • Thailand (Bangkok): 2015
  • Thailand (17 Provinces): 2019
  • Togo: 2010, 2017
  • Tonga: 2019
  • Trinidad and Tobago: 2011, 2022
  • Tunisia: 2011, 2018, 2023
  • Turkmenistan: 2015, 2019
  • Turks and Caicos: 2019
  • Tuvalu: 2019
  • Ukraine: 2012
  • Uzbekistan: 2021
  • Vietnam: 2010, 2013, 2020
  • Yemen: 2022
  • Zimbabwe: 2014, 2019