2.20 Kenya

Kenya 1977 WFS and 1988 and 1993 DHS surveys represents about 95% of total population as the surveys did not include some northern/north-eastern districts due to access/security problems.

2.20.1 Total adolescent births

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Total adolescent births per woman

	Country	5-year birth cohort	Unweighted cases	Total adolescent births
		1940 1990	1490 7618	0.604726046714720 1.209959503583460
1	Kenya	1940	1,490	1.15
2	Kenya	1945	2,600	1.21
3	Kenya	1950	3,750	1.10
4	Kenya	1955	4,073	1.13
5	Kenya	1960	5,205	0.98
6	Kenya	1965	7,563	0.83
7	Kenya	1970	7,618	0.75
8	Kenya	1975	7,513	0.67
9	Kenya	1980	7,111	0.71
10	Kenya	1985	7,160	0.69

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2.20.2 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
		1940 1990		152 1835	1.056774671021350 3.156712934967190
1	Kenya	1940	14 years and younger	152	3.11
2	Kenya	1940	15-17 years	422	2.01
3	Kenya	1940	18-19 years	365	1.08
4	Kenya	1945	14 years and younger	288	3.16
5	Kenya	1945	15-17 years	772	2.00
6	Kenya	1945	18-19 years	616	1.11
7	Kenya	1950	14 years and younger	334	3.00
8	Kenya	1950	15-17 years	1,060	1.92
9	Kenya	1950	18-19 years	902	1.14
10	Kenya	1955	14 years and younger	390	2.86

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2.20.3 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
		1940 1990		152 1835	0.140259468434376 0.535468337819875
1	Kenya	1940	14 years and younger	152	0.29
2	Kenya	1940	15-17 years	422	0.49
3	Kenya	1940	18-19 years	365	0.23
4	Kenya	1945	14 years and younger	288	0.31
5	Kenya	1945	15-17 years	772	0.48
6	Kenya	1945	18-19 years	616	0.21
7	Kenya	1950	14 years and younger	334	0.26
8	Kenya	1950	15-17 years	1,060	0.49
9	Kenya	1950	18-19 years	902	0.25
10	Kenya	1955	14 years and younger	390	0.26

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2.20.4 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
			3617 13803	0.202778794024906 0.498767535491768
1	Kenya	14 years and younger	3,617	0.20
2	Kenya	15-17 years	13,803	0.50
3	Kenya	18-19 years	13,392	0.30

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2.20.5 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
		1940 1970		244 2866	4.230755670737720 8.506752049607879
1	Kenya	1940	All mothers	592	7.80
2	Kenya	1940	In adolescence	348	8.51
3	Kenya	1940	After adolescence	244	6.87
4	Kenya	1945	All mothers	1,150	7.64
5	Kenya	1945	In adolescence	724	8.25
6	Kenya	1945	After adolescence	426	6.66
7	Kenya	1950	All mothers	1,064	6.98
8	Kenya	1950	In adolescence	631	7.65
9	Kenya	1950	After adolescence	433	6.04
10	Kenya	1955	All mothers	1,063	6.44

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2.20.6 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
		1940 1970	1.485054580184080 1.813052207404160
1	Kenya	1940	1.64
2	Kenya	1945	1.58
3	Kenya	1950	1.61
4	Kenya	1955	1.68
5	Kenya	1960	1.81
6	Kenya	1965	1.50
7	Kenya	1970	1.49

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2.20.7 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
		1940 1970	592 2866	0.128640444805836 0.167012594682322
1	Kenya	1940	592	0.13
2	Kenya	1945	1,150	0.15
3	Kenya	1950	1,064	0.16
4	Kenya	1955	1,063	0.17
5	Kenya	1960	1,233	0.15
6	Kenya	1965	2,866	0.15
7	Kenya	1970	2,146	0.15

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2.20.8 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
		1940 1980	1457 4587	19.09067815075380 20.69112460882770
1	Kenya	1940	1,457	19.29
2	Kenya	1945	1,808	19.11
3	Kenya	1950	2,177	19.13
4	Kenya	1955	2,985	19.09
5	Kenya	1960	3,185	19.76
6	Kenya	1965	4,546	20.27
7	Kenya	1970	4,586	20.46
8	Kenya	1975	4,587	20.69
9	Kenya	1980	3,167	20.53

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2.20.9 Adolescent parity progression ratios

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Adolescent parity progression ratios

	Country	5-year birth cohort	Progression ratio from	Unweighted cases	Ratio
		1940 1990		6 3949	0.136404778670693 0.640754911270064
1	Kenya	1940	none to 1st birth	939	0.63
2	Kenya	1940	1st to 2nd birth	500	0.53
3	Kenya	1940	2nd to 3rd birth	198	0.41
4	Kenya	1940	3rd to 4th birth	59	0.30
5	Kenya	1940	4th to 5th birth	15	0.26
6	Kenya	1945	none to 1st birth	1,676	0.64
7	Kenya	1945	1st to 2nd birth	925	0.55
8	Kenya	1945	2nd to 3rd birth	382	0.43
9	Kenya	1945	3rd to 4th birth	103	0.30
10	Kenya	1945	4th to 5th birth	20	0.17

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2.20.10 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
		1940 1990			0 1835	0.000000000000000 0.951243567130105
1	Kenya	1940	14 years and younger	none to 1st birth	152	0.11
2	Kenya	1940	15-17 years	none to 1st birth	422	0.28
3	Kenya	1940	18-19 years	none to 1st birth	365	0.24
4	Kenya	1940	14 years and younger	1st to 2nd birth	144	0.95
5	Kenya	1940	15-17 years	1st to 2nd birth	321	0.76
6	Kenya	1940	18-19 years	1st to 2nd birth	35	0.08
7	Kenya	1940	14 years and younger	2nd to 3rd birth	109	0.75
8	Kenya	1940	15-17 years	2nd to 3rd birth	88	0.29
9	Kenya	1940	18-19 years	2nd to 3rd birth	1	0.02
10	Kenya	1940	14 years and younger	3rd to 4th birth	47	0.44

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2.20.11 Rapid Repeat Birth probability

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Likelihood that an adolescent mother has a rapid repeat birth

	Country	5-year birth cohort	Likelihood
			0.213253294260933 0.371365858771522
1	Kenya	1940	0.36
2	Kenya	1945	0.37
3	Kenya	1950	0.35
4	Kenya	1955	0.33
5	Kenya	1960	0.31
6	Kenya	1965	0.29
7	Kenya	1970	0.26
8	Kenya	1975	0.23
9	Kenya	1980	0.25
10	Kenya	1985	0.26

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2.20.12 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
		1940 1990	779 2288	0.462808819210212 0.534824537770892
1	Kenya	1940	779	0.52
2	Kenya	1945	1,448	0.53
3	Kenya	1950	1,756	0.53
4	Kenya	1955	1,920	0.50
5	Kenya	1960	1,928	0.50
6	Kenya	1965	2,288	0.51
7	Kenya	1970	1,946	0.46
8	Kenya	1975	1,546	0.47
9	Kenya	1980	1,799	0.51
10	Kenya	1985	1,963	0.50

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