Main survey variable: bwtwk Weeks early or late

Weeks early or late

Datafiles

Index terms

Derived variable note:

Weeks early or late (BHPS)

See BWTG5, BWTGM, BWTKN, BWTLB, BWTOZ, BWTXP

Derived variable note:

Uses BW_BWTWK on data file BW_INDRESP/

Question asked in the latest wave:

annualfertilityhistory_w15.bwtwk

Question label:

Weeks early or late

Question text:

How many weeks [early/late] was [CHILD NAME]?

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 [BwtXp = 2] // Child was not born within one week of expected due date

Question interviewer instructions:

ROUND UP HALF WEEKS

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

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	69953	90.96%
don't know	-1	5	0.01%
[Value >= 0]	1	6950	9.04%
	Total	76908	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.55	69958	1.0	16.0	1.93	6950

Value label	Value	Absolute frequency	Relative frequency
missing	-9	1	0.19%
inapplicable	-8	395	73.97%
don't know	-1	2	0.37%
[Value >= 0]	1	136	25.47%
	Total	534	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.43	398	1.0	8.0	1.2	136

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	413	77.49%
refusal	-2	2	0.38%
[Value >= 0]	1	118	22.14%
	Total	533	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.47	415	1.0	10.0	1.55	118

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	484	79.34%
[Value >= 0]	1	126	20.66%
	Total	610	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.71	484	1.0	15.0	1.78	126

Value label	Value	Absolute frequency	Relative frequency
missing	-9	1	0.18%
inapplicable	-8	432	77.98%
refusal	-2	1	0.18%
don't know	-1	1	0.18%
[Value >= 0]	1	119	21.48%
	Total	554	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
3.07	435	1.0	16.0	2.53	119

Value label	Value	Absolute frequency	Relative frequency
missing	-9	3	0.42%
inapplicable	-8	553	77.45%
refusal	-2	1	0.14%
[Value >= 0]	1	157	21.99%
	Total	714	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.64	557	1.0	14.0	1.79	157

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	593	76.61%
[Value >= 0]	1	181	23.39%
	Total	774	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.7	593	1.0	13.0	1.73	181

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	643	77.75%
[Value >= 0]	1	184	22.25%
	Total	827	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.43	643	1.0	12.0	1.65	184

Value label	Value	Absolute frequency	Relative frequency
missing	-9	1	0.11%
inapplicable	-8	711	76.12%
[Value >= 0]	1	222	23.77%
	Total	934	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.72	712	1.0	13.0	1.92	222

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	731	77.6%
[Value >= 0]	1	211	22.4%
	Total	942	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.46	731	1.0	13.0	1.65	211

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	705	76.71%
[Value >= 0]	1	214	23.29%
	Total	919	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.67	705	1.0	10.0	1.77	214

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	870	76.72%
[Value >= 0]	1	264	23.28%
	Total	1134	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.64	870	1.0	15.0	1.84	264

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	987	74.94%
[Value >= 0]	1	330	25.06%
	Total	1317	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.35	987	1.0	14.0	1.58	330

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1076	74.77%
[Value >= 0]	1	363	25.23%
	Total	1439	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.34	1076	1.0	15.0	1.63	363

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1243	73.94%
don't know	-1	1	0.06%
[Value >= 0]	1	437	26.0%
	Total	1681	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
2.71	1244	1.0	16.0	2.33	437

Value label	Value	Absolute frequency	Relative frequency
missing	-9	161929	96.17%
inapplicable	-8	3664	2.18%
	Total	168377	100.0%

Saved variables

0

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bwtwk

Datafiles

Index terms

Derived variable note:

Derived variable note:

Question asked in the latest wave:

annualfertilityhistory_w15.bwtwk

Question label:

Question text:

Question universe:

Question interviewer instructions:

Saved variables

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Datafiles

Index terms

Derived variable note:

Derived variable note:

Question asked in the latest wave:

annualfertilityhistory_w15.bwtwk

Question label:

Question text:

Question universe:

Question interviewer instructions:

Wave 1 (a_bwtwk natchild)

Wave 15 (o_bwtwk newborn)

Wave 14 (n_bwtwk newborn)

Wave 13 (m_bwtwk newborn)

Wave 12 (l_bwtwk newborn)

Wave 11 (k_bwtwk newborn)

Wave 10 (j_bwtwk newborn)

Wave 9 (i_bwtwk newborn)

Wave 8 (h_bwtwk newborn)

Wave 7 (g_bwtwk newborn)

Wave 6 (f_bwtwk newborn)

Wave 5 (e_bwtwk newborn)

Wave 4 (d_bwtwk newborn)

Wave 3 (c_bwtwk newborn)

Wave 2 (b_bwtwk newborn)

Wave xwave (bwtwk xwavedat)

Saved variables 0

What else is Understanding Society doing?

Call for new fellows open

Diversity or disadvantage? Families and employment of immigrants’ children in the UK

New variable search

New edition of marital and cohabitation histories

Email newsletter

Saved variables

0