How old were you when you had your very first menstrual period?

Name

H3DA45

Label

Conceptual Variable

Representation Type

Code List

Selection Style

SelectOne

Measurement Unit

numeric

Codes

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	Wave I	Wave II	Wave III
	Wave I In-Home Interview	Wave II In-Home Interview	Wave III In-Home Interview
	Wave I In-Home Interview Data	Wave II In-Home Interview	Wave III In-Home Interview
	H1FP4	H2FP4	H3DA45
seven years or younger			0.11%
seven years old and younger	0.16%
7 years old and younger		0.01%
eight years old	0.40%		0.39%
8 years old		0.38%
nine years old	3.04%		2.95%
9 years old		2.89%
ten years old	7.07%		5.29%
10 years old		6.22%
eleven years old	19.84%		13.76%
11 years old		19.15%
twelve years old	32.33%		28.37%
12 years old		31.58%
thirteen years old	24.59%		25.01%
13 years old		25.50%
fourteen years old	9.03%		12.30%
14 years old		10.35%
fifteen years old	2.76%		6.15%
15 years old		2.96%
sixteen years old	0.67%		3.35%
16 years old		0.69%
seventeen years old			0.90%
seventeen years old and older	0.10%
17 years old and older		0.10%
eighteen years old			0.38%
nineteen years old			0.15%
twenty years old			0.20%
twenty one years old			0.18%
twenty two years old			0.18%
twenty three years old			0.13%
twenty four years old			0.08%
twenty five years old			0.10%
twenty six years old			0.04%

	Add Health
	Wave I	Wave II	Wave III
	Wave I In-Home Interview	Wave II In-Home Interview	Wave III In-Home Interview
	Wave I In-Home Interview Data	Wave II In-Home Interview	Wave III In-Home Interview
	H1FP4	H2FP4	H3DA45
seven years or younger			0.06%
seven years old and younger	0.07%
7 years old and younger		0.01%
eight years old	0.18%		0.20%
8 years old		0.18%
nine years old	1.38%		1.54%
9 years old		1.36%
ten years old	3.20%		2.76%
10 years old		2.92%
eleven years old	8.99%		7.17%
11 years old		9.00%
twelve years old	14.64%		14.79%
12 years old		14.84%
thirteen years old	11.14%		13.04%
13 years old		11.98%
fourteen years old	4.09%		6.41%
14 years old		4.86%
fifteen years old	1.25%		3.20%
15 years old		1.39%
sixteen years old	0.30%		1.74%
16 years old		0.33%
seventeen years old			0.47%
seventeen years old and older	0.04%
17 years old and older		0.05%
eighteen years old			0.20%
nineteen years old			0.08%
twenty years old			0.11%
twenty one years old			0.09%
twenty two years old			0.09%
twenty three years old			0.07%
twenty four years old			0.04%
twenty five years old			0.05%
twenty six years old			0.02%

Dataset	Variable	Valid	Invalid	Min	Max
Wave I In-Home Interview Data	H1FP4	9,393	11,352	7	17
Wave II In-Home Interview	H2FP4	6,926	7,812	0	17
Wave III In-Home Interview	H3DA45	7,921	7,276	7	26

	Add Health
	Wave I	Wave II	Wave III
	Wave I In-Home Interview	Wave II In-Home Interview	Wave III In-Home Interview
	Wave I In-Home Interview Data	Wave II In-Home Interview	Wave III In-Home Interview
	H1FP4	H2FP4	H3DA45
seven years or younger			7
seven years old and younger	7
7 years old and younger		7
eight years old	8		8
8 years old		8
nine years old	9		9
9 years old		9
ten years old	10		10
10 years old		10
eleven years old	11		11
11 years old		11
twelve years old	12		12
12 years old		12
thirteen years old	13		13
13 years old		13
fourteen years old	14		14
14 years old		14
fifteen years old	15		15
15 years old		15
sixteen years old	16		16
16 years old		16
seventeen years old			17
seventeen years old and older	17
17 years old and older		17
eighteen years old			18
nineteen years old			19
twenty years old			20
twenty one years old			21
twenty two years old			22
twenty three years old			23
twenty four years old			24
twenty five years old			25
twenty six years old			26