NSHD46 : Data-Field 20070

Data-Field 20070

Description:	When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time
Category:	Specialist questionnaire data ⏵ Womens health questionnaire ⏵ Menstrual cycle

Participants

739

Integer, years

Both sexes

Jan 2026

2,154

Data

Defined (11)

N/A

Complete

Primary

dX oX sX

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Data

2,154 items of data are available, covering 739 participants.
Some values have special meanings defined by Data-Coding 20070.
Defined-instances run from 40 to 50, labelled using Instancing 1.
Units of measurement are years.

Data has not been summarised because combining instances would be misleading.

10 Instances

Instance 40 : 1993 - Women's health questionnaire at age 47 years
153 participants, 306 items

Maximum	47
Decile 9	47
Decile 8	47
Decile 7	47
Decile 6	47
Median	41
Decile 4	40
Decile 3	39
Decile 2	36.5
Decile 1	34
Minimum	28

There are 14 distinct values.
Mean = 41.3678
Std.dev = 5.54421
26 items have value 38 (38)
18 items have value 42 (42)
14 items have value 43 (43)
16 items have value 44 (44)
28 items have value 45 (45)
26 items have value 46 (46)
4 items have value 48 (48)

Instance 41 : 1994 - Women's health questionnaire at age 48 years
96 participants, 192 items

Maximum	47
Decile 9	47
Decile 8	47
Decile 7	47
Decile 6	47
Median	41
Decile 4	38
Decile 3	35.5
Decile 2	32.5
Decile 1	20.5
Minimum	0

There are 12 distinct values.
Mean = 38.3871
Std.dev = 11.9263
10 items have value 38 (38)
6 items have value 42 (42)
12 items have value 43 (43)
2 items have value 44 (44)
10 items have value 45 (45)
6 items have value 46 (46)
84 items have value 48 (48)

Instance 42 : 1995 - Women's health questionnaire at age 49 years
101 participants, 202 items

Maximum	49
Decile 9	49
Decile 8	49
Decile 7	49
Decile 6	49
Median	49
Decile 4	49
Decile 3	49
Decile 2	47
Decile 1	40
Minimum	30

There are 7 distinct values.
Mean = 47.082
Std.dev = 4.03385
2 items below graph minimum of 31
8 items have value 38 (38)
4 items have value 42 (42)
2 items have value 43 (43)
6 items have value 44 (44)
20 items have value 45 (45)
10 items have value 46 (46)
30 items have value 48 (48)

Instance 43 : 1996 - Women's health questionnaire at age 50 years
117 participants, 234 items

Maximum	51
Decile 9	49
Decile 8	49
Decile 7	49
Decile 6	49
Median	49
Decile 4	49
Decile 3	48
Decile 2	47
Decile 1	36.5
Minimum	32

There are 10 distinct values.
Mean = 46.5682
Std.dev = 4.88224
2 items have value 38 (38)
8 items have value 42 (42)
4 items have value 43 (43)
4 items have value 44 (44)
10 items have value 45 (45)
14 items have value 46 (46)
26 items have value 48 (48)
78 items have value 50 (50)

Instance 44 : 1997 - Women's health questionnaire at age 51 years
106 participants, 212 items

Maximum	51
Decile 9	51
Decile 8	51
Decile 7	51
Decile 6	51
Median	49
Decile 4	49
Decile 3	47
Decile 2	41
Decile 1	37
Minimum	11

There are 10 distinct values.
Mean = 46.8214
Std.dev = 7.06123
2 items below graph minimum of 23
2 items have value 38 (38)
4 items have value 42 (42)
4 items have value 43 (43)
4 items have value 44 (44)
8 items have value 45 (45)
6 items have value 46 (46)
12 items have value 48 (48)
58 items have value 50 (50)
2 items have value 52 (52)

Instance 45 : 1998 - Women's health questionnaire at age 52 years
96 participants, 192 items

Maximum	51
Decile 9	51
Decile 8	51
Decile 7	51
Decile 6	51
Median	51
Decile 4	49
Decile 3	47
Decile 2	40
Decile 1	34.5
Minimum	11

There are 10 distinct values.
Mean = 46.5814
Std.dev = 7.89239
2 items below graph minimum of 18
2 items have value 38 (38)
2 items have value 42 (42)
2 items have value 43 (43)
2 items have value 44 (44)
12 items have value 45 (45)
6 items have value 46 (46)
8 items have value 48 (48)
22 items have value 50 (50)
50 items have value 52 (52)

Instance 46 : 1999 - Women's health questionnaire at age 53 years
87 participants, 174 items

Maximum	51
Decile 9	51
Decile 8	51
Decile 7	51
Decile 6	51
Median	51
Decile 4	51
Decile 3	51
Decile 2	50
Decile 1	49
Minimum	11

There are 3 distinct values.
Mean = 48.4118
Std.dev = 9.37493
2 items below graph minimum of 47
4 items have value 38 (38)
8 items have value 42 (42)
2 items have value 43 (43)
4 items have value 46 (46)
10 items have value 48 (48)
12 items have value 50 (50)
54 items have value 52 (52)
46 items have value 53 (53)

Instance 47 : 2000 - Women's health questionnaire at age 54 years
49 participants, 98 items
Too few values for statistical summary.

Instance 48 : 2003 - Women's health questionnaire at age 57 years
119 participants, 238 items
Too few values for statistical summary.

Instance 50 : 2006 - Women's health questionnaire at age 60-64 years
153 participants, 306 items

Maximum	63
Decile 9	59
Decile 8	58
Decile 7	58
Decile 6	51
Median	51
Decile 4	49
Decile 3	47
Decile 2	39
Decile 1	32
Minimum	30

There are 12 distinct values.
Mean = 49.3667
Std.dev = 9.48502
6 items have value 42 (42)
4 items have value 43 (43)
6 items have value 44 (44)
8 items have value 45 (45)
8 items have value 46 (46)
14 items have value 48 (48)
34 items have value 50 (50)
46 items have value 52 (52)
24 items have value 53 (53)
26 items have value 54 (54)
30 items have value 55 (55)
24 items have value 56 (56)
16 items have value 57 (57)

Notes

blla93 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 47 years, blla94 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 48 years, blla95 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 49 years, blla96 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 50 years, blla97 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 51 years, blla98 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 52 years, blla99 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 53 years, blla00 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 54 years, blla03 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 57 years, blla09 - When was your last period? (Include current period if bleeding now) - if you cannot remember the month and year give the age at the time - at age 60-64 years

Coding 20070 defines 14 special values:

38 represents "38"
42 represents "42"
43 represents "43"
44 represents "44"
45 represents "45"
46 represents "46"
48 represents "48"
50 represents "50"
52 represents "52"
53 represents "53"
54 represents "54"
55 represents "55"
56 represents "56"
57 represents "57"

0 Related Data-Fields

There are no related data-fields

0 Resources

There are no matching Resources

National Survey of Health and Development 1946 Cohort