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Demographic and Health Survey 2013-14 - IPUMS Subset

Zambia, 2013 - 2014
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Reference ID
ZMB_2013_DHS_v01_M_v02_A_IPUMS
Producer(s)
Central Statistical Office, Ministry of Health [Zambia], and ICF International., Minnesota Population Center
Metadata
DDI/XML JSON
Created on
Sep 19, 2018
Last modified
Sep 19, 2018
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154017

Respondent's date of birth, in century months (B_DOBCMC)

Data file: ZMB2013-B.dat

Overview

Type: Continuous
Decimal: 0
Start: 256
End: 259
Width: 4
Range: -
Format: Numeric

Questions and instructions

Literal question
102) In what month and year were you born?

MONTH_______________
DON'T KNOW MONTH 98

YEAR__________________
DON'T KNOW YEAR 9998

Description

Definition
DOBCMC (V011) reports the century month code (CMC) for the woman's date of birth.

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 year 1900 was chosen as the reference period because all of the DHS-relevant events occurred during the twentieth or twenty-first centuries. The month of the event is added to the previous result.

CMC = (Year - 1900) * 12 + Month

For example, the CMC for June 2002 is:

CMC = (2002 - 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 - 1 )/12 ) + 1900
[int(x) is the integer part of x]
Month = CMC - ( ( Year - 1900 ) * 12 )

The information above is based on "Online Guide to DHS Statistics" (Rutstein and Rojas, 2006) [URL omitted from DDI.].

concept

Concept
var_concept.title Vocabulary
Core demographic Variables -- TOPICS IPUMS

Imputation and derivation

Derivation
DOBCMC (V011) is a 4-digit variable.
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