Home » Data » Weighting data » SSU variables in the Mauritania DHS2019-2021 (The number of pregnant women who delivered their last child in the past five years preceding to the survey in Mauritania)
| Re: SSU variables in the Mauritania DHS2019-2021 [message #28945 is a reply to message #28936] |
Mon, 01 April 2024 08:20  |
Bridgette-DHS
Messages: 3105
Registered: February 2013
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Senior Member |
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Following is a response from Senior DHS staff member, Tom Pullum:
My previous response said what was the difference between the two tables. I'm still not quite sure what your hypothesis is, about the difference between Nouakchott and the rest of Mauritania, but the comparisons that I believe you are trying to make would have to take account of the date of interview, which affects the length of time after August 2019 that the woman could have had a birth.
As you would know, the data collection for Mauritania was spread over 3 calendar years, 2019-2021. Most of the fieldwork was between late November 2019 and March of 2020. Because of Covid, fieldwork was suspended, and was not resumed and completed until February-March 2021. As it happens, the three areas that make up Nouakchott were the only areas that were surveyed in 2021.
Here is a table that gives the century month code (cmc, hv008) and the number of interviews in each month of data collection. This table has households as units and is unweighted. Ignore the "totals" row and column:
. tab hv006 hv007, summarize(hv008) means freq
Means and Frequencies of date of interview (cmc)
month of | year of interview
interview | 2019 2020 2021 | Total
-----------+---------------------------------+----------
1 | . 1441 . | 1441
| 0 2540 0 | 2540
-----------+---------------------------------+----------
2 | . 1442 1454 | 1443.591
| 0 2545 389 | 2934
-----------+---------------------------------+----------
3 | . 1443 1455 | 1447.8632
| 0 2009 1369 | 3378
-----------+---------------------------------+----------
11 | 1439 . . | 1439
| 115 0 0 | 115
-----------+---------------------------------+----------
12 | 1440 . . | 1440
| 2691 0 0 | 2691
-----------+---------------------------------+----------
Total | 1439.959 1441.9251 1454.7787 | 1443.3902
| 2806 7094 1758 | 11658
The cmc's for February-March 2021 are 1454 and 1455. In those months, 389 and 1369 households, respectively, were interviewed.
Next, still with households as units, I get the number of interviews by region and cmc as follows:
tab hv024 hv008
| date of interview (cmc)
region | 1439 1440 1441 1442 1443 1454 1455 | Total
----------------------+-----------------------------------------------------------------------------+----------
hodh echargui | 14 498 281 218 136 0 0 | 1,147
hodh gharbi | 6 133 266 402 219 0 0 | 1,026
assaba | 9 325 279 283 198 0 0 | 1,094
gorgol | 14 263 263 267 129 0 0 | 936
brakna | 6 246 298 263 239 0 0 | 1,052
trarza | 15 254 275 292 190 0 0 | 1,026
adrar | 7 230 157 134 140 0 0 | 668
dakhlet nouadhibou | 8 141 147 141 231 0 0 | 668
tagant | 14 226 241 197 51 0 0 | 729
guidimagha | 16 279 169 118 245 0 0 | 827
tiris zemour et inchi | 6 96 164 230 231 0 0 | 727
nouakchott ouest | 0 0 0 0 0 103 479 | 582
nouakchott nord | 0 0 0 0 0 174 417 | 591
nouakchott sud | 0 0 0 0 0 112 473 | 585
----------------------+-----------------------------------------------------------------------------+----------
Total | 115 2,691 2,540 2,545 2,009 389 1,369 | 11,658
To me, it is notable that the date collection is neatly divided, geographically, into pre-covid and post-covid, giving a kind of natural experimental design for potential effects of covid. But I don't see this as a good design for assessing the impact of an intervention in August 2019 in Nouakchott. Any potential effect of that intervention will be completely confounded with the potential effect of covid during the interruption to fieldwork.
If you have other questions, perhaps other users can help.
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Current Time: Tue Jul 9 10:22:45 Coordinated Universal Time 2024
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