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SISS

SISS 2018

Mongolia, 2018
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Reference ID
DDI-MNG-NSO-EN-SISS-2018-v1.0
Producer(s)
National Statistical Office
Collections
SOCIAL INDICATOR SAMPLE SURVEY
Metadata
DDI/XML JSON
Created on
Oct 16, 2025
Last modified
Nov 04, 2025
Page views
36115
  • Study Description
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  • Abortion
  • Fertility,
    birth history
  • Child under 5
  • Child age 5-17
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  • Women

Start of last menstrual period - number (UN14N)

Data file: Women

Overview

Valid: 10791
Invalid: 946
Minimum: 0
Maximum: 99
Type: Discrete
Decimal: 0
Width: 2
Range: 0 - 99
Format: Numeric

Questions and instructions

Literal question
When did your last menstrual period start?
Categories
Value Category Cases
0 171
1.6%
1 3650
33.8%
2 2276
21.1%
3 1497
13.9%
4 572
5.3%
5 569
5.3%
6 326
3%
7 271
2.5%
8 142
1.3%
9 133
1.2%
10 246
2.3%
11 81
0.8%
12 65
0.6%
13 33
0.3%
14 68
0.6%
15 58
0.5%
16 22
0.2%
17 23
0.2%
18 32
0.3%
19 16
0.1%
20 110
1%
21 16
0.1%
22 15
0.1%
23 17
0.2%
24 22
0.2%
25 23
0.2%
26 15
0.1%
27 10
0.1%
28 18
0.2%
29 2
0%
30 24
0.2%
93 IN MENOPAUSE / HAS HAD HYSTERECTOMY 101
0.9%
94 BEFORE LAST BIRTH 144
1.3%
95 NEVER MENSTRUATED 15
0.1%
99 NO RESPONSE 8
0.1%
Sysmiss 946
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
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