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. Author manuscript; available in PMC: 2025 Aug 19.
Published in final edited form as: J Affect Disord. 2023 Oct 16;344:339–346. doi: 10.1016/j.jad.2023.10.061

Table 1. Descriptive statistics of all variables included in the analysis, imputed data (n = 8952).

All
participants
N= 8952a
Attended
university
N = 2037
Did not
attend
university
N = 1129
Continuous variables Mean (SD) Mean (SD) Mean (SD)
Age of mother at birth 28.3 (4.7) 29.8 (4.3) 28.2 (4.7)
Maternal depressive symptoms: number of times mother scored 13+ on the Edinburgh Postnatal Depression Scale (EPDS)b 0.63 (1.1) 0.52 (1.0) 0.67 (1.1)
Young person's educational achievement at age 14c 107.0
(24.3)
122.1
(17.7)
102.6
(21.3)
Young person's educational achievement at age 16d 326.7
(90.2)
393.2
(49.6)
308.5
(76.5)
Young person's depressive symptoms at 16: 12-item Short Mood and Feelings Questionnaire (SMFQ) 5.8 (5.6) 5.8 (5.3) 6.5 (6.3)
Young person's locus of control at 16: 12-item Children's Nowicki- Strickland Internal-External scale (CNSIE) 3.5 (2.2) 2.8 (1.9) 3.9 (2.2)
Distance to university from family home (km) 121.9
(108.4)
Categorical variables % % %
Maternal depressive
symptoms: number
of times mother
scored 13+ on the
Edinburgh
Postnatal
Depression Scale
(EPDS)e
0 64.8 68.9 63.5
1 19.6 18.6 19.1
2 or more 15.7 12.5 17.4
Young person
studied at higher
education
No 50.1
Yes 49.9
Young person's sex Male 50.2 34.3 34.1
Female 49.8 65.7 65.9
Maternal
occupational social
class
Professional 4.5 8.4 2.0
Managerial 29.2 40.1 26.6
Skilled non-
manual
45.2 40.0 49.3
Skilled manual 8.3 4.6 9.1
Semi-skilled 10.3 5.9 10.8
Unskilled 2.5 0.9 2.2
Maternal highest
qualification
Degree 11.7 23.8 5.0
Vocational 9.9 5.5 12.8
A level 23.0 32.1 20.5
CSE/GCSE 51.1 36.6 56.8
None 4.4 2.1 5.0
Mother in work or
voluntary work
when young person is 11
Yes 76.9 84.9 76.4
No 33.1 15.1 23.6
Reason chose university: distance to family home Not importantf 43.3
Importantg 56.7
Reason chose university: to stay close to family/children at school Not importantf 87.6
Importantg 12.4
Reason didn’t go to university: didn’t want to be a financial burden Not importantf 66.1
Importantg 33.9
Reason didn’t go to university: had other priorities (e.g., family/
children)
Not importantf 84.8
Importantg 15.2
a

In analyses of higher education participation (N = 8952) the outcome was imputed for some participants. For analyses specific to university attendees (N = 2037) and non-attendees (N = 1139), we restricted based on higher education participation as reported in the age 26 questionnaire.

b

Main exposure in analyses. Possible range: 0–5. Mothers completed the EPDS when the young person was: 1, 5, 8, 11 and 18 years old.

c

Summary score based on results in English, Maths and Science, range 1–141.

d

Summary score based on the pupil's best 8 subjects, range 0–540.

e

Included for descriptive purposes only: analyses used a continuous measure of number of times the mother scored 13+.

f

Collapsed from: extremely unimportant, unimportant, neither important nor unimportant.

g

Collapsed from: extremely important, important.