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twin birth, weight and size of the last birth [message #11232] Sat, 19 November 2016 11:52 Go to next message
dhs110 is currently offline  dhs110
Messages: 39
Registered: October 2014
Location: korea
Thank you very much for your help.I am working on last birth in the last five years by cesarean section (M17_1). I want to confirm the variables for the size, weight and twin status of the last delivery that M18_1 for size, M19_1 for weight in kg and B0_1 is the twin delivery status of the latest birth by c/s?
Kindly confirm.

Re: twin birth, weight and size of the last birth [message #11252 is a reply to message #11232] Wed, 23 November 2016 11:06 Go to previous message
Messages: 1333
Registered: February 2013
Senior Member
Dear User,
According to the recode manual http:// onnaires-and-manuals.cfm page 57

M17 Whether child was born by caesarian section
M18 Size of child as reported subjectively by the respondent
M19 Weight of child at birth given in kilograms with three implied decimal places (or grams with
no decimal places). Children who were not weighed are coded 9996. In some countries, the
birth weight was collected in grams, i.e. a total of four digits, whereas other countries
collected the weight in kilograms to one decimal place, i.e. a total of two digits. In the latter
case, the third and fourth digits are set to zeros. In a few countries, the weight was collected
in pounds and/or ounces. For these countries, the original weight variables are stored as a
country-specific variable and this variable contains the weight converted to kilograms.


B0 Twin code gives an order number for each child of a multiple birth. Code 0 indicates a
single birth, code 1-upwards give the number of the child. Twins are ordered in the birth
history with the higher twin codes appearing before the lower twin codes. See the example
of the birth history structure below.

Example Birth History:

Hope this helps. Thank you for your post.
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