Main survey variable: bwtk Birthweight kilograms

Birthweight kilograms

Datafiles

Index terms

Question asked in the latest wave:

annualfertilityhistory_w15.bwtk

Question label:

Birthweight kilograms

Question universe:

if [ff_ivlolw = 1 | ff_everint = 1] // Interviewed at prior wave or has been interviewed previously
And if [NextPreg = 1] // Has not reached current pregnancy status
And if [(PregOut = 1|2) | Pregend =2] // Pregnancy or partner's pregnancy ended in live birth or stillbirth;
And if [((Preg = 1|2) | (MORPREG = 1)) & LChLv = 1] // Female birth parent and newborn child resident
And if [Bwt = 2] // Birthweight given in kilograms and grams

Further details:
For further details about this question, please see the questionnaires

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	75295	97.9%
don't know	-1	12	0.02%
[Value >= 0]	1	1601	2.08%
	Total	76908	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.26	75307	0	10.0	0.86	1601

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	497	93.07%
[Value >= 0]	1	37	6.93%
	Total	534	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.32	497	1.9	4.22	0.53	37

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	494	92.68%
[Value >= 0]	1	39	7.32%
	Total	533	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.54	494	1.47	8.0	1.25	39

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	572	93.77%
[Value >= 0]	1	38	6.23%
	Total	610	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.08	572	0.8	4.0	0.68	38

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	521	94.04%
[Value >= 0]	1	33	5.96%
	Total	554	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.13	521	1.0	5.6	0.87	33

Value label	Value	Absolute frequency	Relative frequency
missing	-9	3	0.42%
inapplicable	-8	666	93.28%
refusal	-2	3	0.42%
don't know	-1	1	0.14%
[Value >= 0]	1	41	5.74%
	Total	714	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.19	673	1.46	4.0	0.65	41

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	725	93.67%
refusal	-2	1	0.13%
don't know	-1	1	0.13%
[Value >= 0]	1	47	6.07%
	Total	774	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.07	727	1.9	4.5	0.62	47

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	769	92.99%
[Value >= 0]	1	58	7.01%
	Total	827	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.08	769	0.6	4.4	0.74	58

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	872	93.36%
don't know	-1	1	0.11%
[Value >= 0]	1	61	6.53%
	Total	934	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.08	873	1.1	4.4	0.69	61

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	868	92.14%
[Value >= 0]	1	74	7.86%
	Total	942	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.38	868	0.75	8.0	0.88	74

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	862	93.8%
[Value >= 0]	1	57	6.2%
	Total	919	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.29	862	1.24	8.0	1.12	57

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1076	94.89%
[Value >= 0]	1	58	5.11%
	Total	1134	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.2	1076	1.5	7.0	0.8	58

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1231	93.47%
[Value >= 0]	1	86	6.53%
	Total	1317	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.4	1231	0.85	9.0	1.17	86

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1366	94.93%
[Value >= 0]	1	73	5.07%
	Total	1439	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.3	1366	1.6	9.0	1.1	73

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1603	95.36%
[Value >= 0]	1	78	4.64%
	Total	1681	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.29	1603	0.81	4.7	0.61	78

Value label	Value	Absolute frequency	Relative frequency
missing	-9	162027	96.23%
inapplicable	-8	5671	3.37%
[Value >= 0]	1	679	0.4%
	Total	168377	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.26	167698	0.75	9.0	0.88	679

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bwtk

Datafiles

Index terms

Question asked in the latest wave:

annualfertilityhistory_w15.bwtk

Question label:

Question universe:

Code creator
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Saved variables

What else is Understanding Society doing?

Understanding Society Wave 15

Understanding Society Wave 15 – what can data users expect?

Understanding Society used for Gender Equality Index

Understanding Society Biosocial Conference 2026: combining biological and social data

Email newsletter

Datafiles

Index terms

Question asked in the latest wave:

annualfertilityhistory_w15.bwtk

Question label:

Question universe:

Wave 1 (a_bwtk natchild)

Wave 15 (o_bwtk newborn)

Wave 14 (n_bwtk newborn)

Wave 13 (m_bwtk newborn)

Wave 12 (l_bwtk newborn)

Wave 11 (k_bwtk newborn)

Wave 10 (j_bwtk newborn)

Wave 9 (i_bwtk newborn)

Wave 8 (h_bwtk newborn)

Wave 7 (g_bwtk newborn)

Wave 6 (f_bwtk newborn)

Wave 5 (e_bwtk newborn)

Wave 4 (d_bwtk newborn)

Wave 3 (c_bwtk newborn)

Wave 2 (b_bwtk newborn)

Wave xwave (bwtk xwavedat)

Code creator 0

Saved variables

What else is Understanding Society doing?

Understanding Society Wave 15

Understanding Society Wave 15 – what can data users expect?

Understanding Society used for Gender Equality Index

Understanding Society Biosocial Conference 2026: combining biological and social data

Email newsletter

Code creator
0