5.8 Vietnam

5.8.1 Total adolescent births

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Total adolescent births per woman

	Country	5-year birth cohort	Unweighted cases	Total adolescent births
		1945 1990	293 3929	0.157821079730896 0.243438232798141
1	Vietnam	1945	293	0.22
2	Vietnam	1950	1,165	0.18
3	Vietnam	1955	2,111	0.18
4	Vietnam	1960	2,821	0.20
5	Vietnam	1965	3,829	0.21
6	Vietnam	1970	3,929	0.24
7	Vietnam	1975	3,264	0.23
8	Vietnam	1980	2,030	0.19
9	Vietnam	1985	1,357	0.16
10	Vietnam	1990	1,001	0.19

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5.8.2 Total adolescent births by age at first birth

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Total adolescent births per woman by age at first birth

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Total adolescent births
		1945 1990		1 639	1.000000000000000 5.000000000000000
1	Vietnam	1945	14 years and younger	1	5.00
2	Vietnam	1945	15-17 years	15	1.70
3	Vietnam	1945	18-19 years	32	1.06
4	Vietnam	1950	14 years and younger	1	3.00
5	Vietnam	1950	15-17 years	49	1.78
6	Vietnam	1950	18-19 years	120	1.06
7	Vietnam	1955	14 years and younger	5	2.49
8	Vietnam	1955	15-17 years	58	1.73
9	Vietnam	1955	18-19 years	251	1.06
10	Vietnam	1960	14 years and younger	2	1.35

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5.8.3 Contribution to total adolescent fertility by cohort and age at first birth

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Contribution to total adolescent fertility by cohort and age at first birth

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Proportion
		1945 1990		1 639	0.004501914014695 0.731441336244346
1	Vietnam	1945	14 years and younger	1	0.06
2	Vietnam	1945	15-17 years	15	0.43
3	Vietnam	1945	18-19 years	32	0.51
4	Vietnam	1950	14 years and younger	1	0.03
5	Vietnam	1950	15-17 years	49	0.39
6	Vietnam	1950	18-19 years	120	0.58
7	Vietnam	1955	14 years and younger	5	0.04
8	Vietnam	1955	15-17 years	58	0.27
9	Vietnam	1955	18-19 years	251	0.70
10	Vietnam	1960	14 years and younger	2	0.00

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5.8.4 Contribution to total adolescent fertility by age at first birth (all cohorts)

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Contribution to total adolescent fertility by age at first birth (all cohorts)

	Country	Age at first birth	Unweighted cases	Proportion
			43 2885	0.023005224175265 0.677579994412441
1	Vietnam	14 years and younger	43	0.02
2	Vietnam	15-17 years	859	0.30
3	Vietnam	18-19 years	2,885	0.68

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5.8.5 Completed fertility by motherhood entry age

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Children ever born by motherhood entry age, women aged 40 and older

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Number of children
		1945 1970		48 1327	2.314971192783510 7.102761168422340
1	Vietnam	1945	All mothers	259	4.89
2	Vietnam	1945	In adolescence	48	7.10
3	Vietnam	1945	After adolescence	211	4.39
4	Vietnam	1950	All mothers	1,043	4.29
5	Vietnam	1950	In adolescence	170	5.87
6	Vietnam	1950	After adolescence	873	4.00
7	Vietnam	1955	All mothers	1,288	3.73
8	Vietnam	1955	In adolescence	211	5.16
9	Vietnam	1955	After adolescence	1,077	3.46
10	Vietnam	1960	All mothers	645	3.17

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5.8.6 Difference in completed fertility between adolescent and non-adolescent mothers

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Difference in completed fertility between adolescent and non-adolescent mothers

	Country	5-year birth cohort	Difference in number of births
		1945 1970	0.697321391033522 2.709323537081790
1	Vietnam	1945	2.71
2	Vietnam	1950	1.88
3	Vietnam	1955	1.71
4	Vietnam	1960	1.52
5	Vietnam	1965	0.88
6	Vietnam	1970	0.70

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5.8.7 Contribution of adolescent fertility to total fertility by cohort

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Contribution of adolescent fertility to total fertility by cohort

	Country	5-year birth cohort	Unweighted cases	Proportion
		1945 1970	259 1327	0.047233878322754 0.105187539801443
1	Vietnam	1945	259	0.05
2	Vietnam	1950	1,043	0.05
3	Vietnam	1955	1,288	0.05
4	Vietnam	1960	645	0.06
5	Vietnam	1965	1,327	0.07
6	Vietnam	1970	1,000	0.11

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5.8.8 Mean age at first birth

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Mean age at first birth, women with first birth before age 30

	Country	5-year birth cohort	Unweighted cases	Mean age
		1945 1980	259 2807	22.76325260526380 23.71086406790120
1	Vietnam	1945	259	23.63
2	Vietnam	1950	1,043	23.71
3	Vietnam	1955	1,900	23.39
4	Vietnam	1960	2,517	23.17
5	Vietnam	1965	2,807	22.92
6	Vietnam	1970	1,723	22.76
7	Vietnam	1975	1,351	23.18
8	Vietnam	1980	1,054	23.27

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5.8.9 Adolescent parity progression ratios

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Adolescent parity progression ratios

	Country	5-year birth cohort	Progression ratio from	Unweighted cases	Ratio
		1945 1990		0 820	0.000000000000000 1.000000000000000
1	Vietnam	1945	none to 1st birth	48	0.16
2	Vietnam	1945	1st to 2nd birth	12	0.28
3	Vietnam	1945	2nd to 3rd birth	2	0.12
4	Vietnam	1945	3rd to 4th birth	1	0.51
5	Vietnam	1945	4th to 5th birth	1	1.00
6	Vietnam	1950	none to 1st birth	170	0.14
7	Vietnam	1950	1st to 2nd birth	42	0.24
8	Vietnam	1950	2nd to 3rd birth	6	0.15
9	Vietnam	1950	3rd to 4th birth	1	0.11
10	Vietnam	1950	4th to 5th birth	1	1.00

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5.8.10 Adolescent parity progression ratios by age

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Adolescent parity progression ratios by mother's age at first birth

	Country	5-year birth cohort	Age at first birth	Progression ratio from	Unweighted cases	Ratio
		1945 1990			0 639	0.000000000000000 1.000000000000000
1	Vietnam	1945	14 years and younger	none to 1st birth	1	0.00
2	Vietnam	1945	15-17 years	none to 1st birth	15	0.06
3	Vietnam	1945	18-19 years	none to 1st birth	32	0.11
4	Vietnam	1945	14 years and younger	1st to 2nd birth	1	1.00
5	Vietnam	1945	15-17 years	1st to 2nd birth	9	0.66
6	Vietnam	1945	18-19 years	1st to 2nd birth	2	0.06
7	Vietnam	1945	14 years and younger	2nd to 3rd birth	1	1.00
8	Vietnam	1945	15-17 years	2nd to 3rd birth	1	0.07
9	Vietnam	1945	18-19 years	2nd to 3rd birth	0	0.00
10	Vietnam	1945	14 years and younger	3rd to 4th birth	1	1.00

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5.8.11 Rapid Repeat Birth probability

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Likelihood that an adolescent mother has a rapid repeat birth

	Country	5-year birth cohort	Likelihood
			0.115976482559865 0.382391170351421
1	Vietnam	1945	0.23
2	Vietnam	1950	0.38
3	Vietnam	1955	0.26
4	Vietnam	1960	0.27
5	Vietnam	1965	0.25
6	Vietnam	1970	0.22
7	Vietnam	1975	0.21
8	Vietnam	1980	0.23
9	Vietnam	1985	0.17
10	Vietnam	1990	0.12

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5.8.12 Rapid Repeat Birth proportion

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Proportion of nonfirst adolescent births that are rapid repeat births

	Country	5-year birth cohort	Unweighted cases (non-first adolescent births)	Proportion
		1945 1990	16 137	0.404193617078930 0.692053457328326
1	Vietnam	1945	16	0.40
2	Vietnam	1950	50	0.67
3	Vietnam	1955	64	0.55
4	Vietnam	1960	80	0.54
5	Vietnam	1965	137	0.57
6	Vietnam	1970	129	0.60
7	Vietnam	1975	108	0.62
8	Vietnam	1980	52	0.69
9	Vietnam	1985	33	0.46
10	Vietnam	1990	24	0.54

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