: Data-Field 2744

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Data

251,164 items of data are available, covering 221,476 participants.
Some values have special meanings defined by Data-Coding 100585.
Defined-instances run from 0 to 3, labelled using Instancing 2.
Units of measurement are pounds.

Maximum	16
Decile 9	8
Decile 8	8
Decile 7	8
Decile 6	7
Median	7
Decile 4	7
Decile 3	7
Decile 2	6
Decile 1	6
Minimum	2

There are 15 distinct values.
Mean = 7.01097
Std.dev = 1.21568
2691 items below graph minimum of 4
539 items above graph maximum of 10
315 items have value -3 (Prefer not to answer)
1557 items have value -2 (Only had twins)
3400 items have value -1 (Do not know)

Counts of participants/items last updated 30 Oct 2020.

4 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
221,426 participants, 221,426 items

Maximum	16
Decile 9	8
Decile 8	8
Decile 7	8
Decile 6	7
Median	7
Decile 4	7
Decile 3	7
Decile 2	6
Decile 1	6
Minimum	2

There are 15 distinct values.
Mean = 6.99925
Std.dev = 1.21951
2429 items below graph minimum of 4
475 items above graph maximum of 10
296 items have value -3 (Prefer not to answer)
1363 items have value -2 (Only had twins)
3090 items have value -1 (Do not know)

Instance 1 : First repeat assessment visit (2012-13)
8,263 participants, 8,263 items

Maximum	16
Decile 9	8
Decile 8	8
Decile 7	8
Decile 6	7
Median	7
Decile 4	7
Decile 3	7
Decile 2	6
Decile 1	6
Minimum	2

There are 14 distinct values.
Mean = 7.07405
Std.dev = 1.1752
70 items below graph minimum of 4
17 items above graph maximum of 10
4 items have value -3 (Prefer not to answer)
37 items have value -2 (Only had twins)
79 items have value -1 (Do not know)

Instance 2 : Imaging visit (2014+)
19,677 participants, 19,677 items

Maximum	14
Decile 9	8
Decile 8	8
Decile 7	8
Decile 6	7
Median	7
Decile 4	7
Decile 3	7
Decile 2	6
Decile 1	6
Minimum	2

There are 13 distinct values.
Mean = 7.10485
Std.dev = 1.18929
181 items below graph minimum of 4
45 items above graph maximum of 10
14 items have value -3 (Prefer not to answer)
139 items have value -2 (Only had twins)
211 items have value -1 (Do not know)

Instance 3 : First repeat imaging visit (2019+)
1,798 participants, 1,798 items

Maximum	12
Decile 9	8
Decile 8	8
Decile 7	8
Decile 6	7
Median	7
Decile 4	7
Decile 3	7
Decile 2	6
Decile 1	6
Minimum	2

There are 11 distinct values.
Mean = 7.13132
Std.dev = 1.15207
11 items below graph minimum of 4
2 items above graph maximum of 10
1 items have value -3 (Prefer not to answer)
18 items have value -2 (Only had twins)
20 items have value -1 (Do not know)

Notes

ACE touchscreen question "What was the birth weight of your first child in pounds? (do not include twins)"

The following checks were performed:

If answer < 2 then rejected
If answer > 16 then rejected
If answer > 12 then participant asked to confirm

If the participant activated the Help button they were shown the message:

If you are unsure of the weight in pounds, here is a conversion table for pounds, grams and kilograms.

Pounds Grams Kilograms
2 907 0.91
3 1361 1.36
4 1814 1.81
5 2268 2.27
6 2721 2.72
7 3175 3.18
8 3629 3.63
9 4082 4.08
10 4536 4.54
11 4990 4.99
12 5443 5.44
13 5897 5.90
14 6350 6.35
15 6804 6.80

An exact answer is not necessary. Please enter the birthweight to the closest pound.
If your first birth was twins or other multiple birth, enter the birthweight of the first singleton birth.
If you have only had twins or other multiple births then select Only twins.

Field 2744 was collected from women who indicated they had given birth to at least one child, as defined by their answers to Field 2734

Coding 100585 defines 3 special values:

-1 represents "Do not know"
-2 represents "Only had twins"
-3 represents "Prefer not to answer"

5 Categories

Category ID	Description	Items
100000	Assessment Centre	+2145
100069	Female-specific factors	30+2
713	Health outcomes	555
100068	Sex-specific factors	+36
100025	Touchscreen	+403

1 Related Data-Fields

Field ID	Description	Relationship
2734	Number of live births	Current Field was collected from women who indicated they had given birth to at least one child, as defined by their answers to Field 2734

2 Resources

Preview	Name	Res ID
	Screenshot from touchscreen questionnaire used to capture field 2744	100543
	Touchscreen questionnaire ordering, validation and dependencies	113241