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. Author manuscript; available in PMC: 2013 Feb 25.
Published in final edited form as: Twin Res Hum Genet. 2009 Feb;12(1):53–62. doi: 10.1375/twin.12.1.53

Table 4.

Multivariate associations between ADHP measures, family risk status, prenatal exposure variables, and parental psychopathology^.

ADHP-4B ADHP-6B ADHP-4N ADHP-6N
Risk status Prev
(%)
OR
(95% CI)
Prev
(%)
OR
(95% CI)
Prev
(%)
OR
(95% CI)
Prev
(%)
OR
(95% CI)
1. Dad AD 19.6 1.10
(0.70–1.72)
8.7 0.88
(0.46–1.70)
8.1 0.78
(0.41–1.50)
6.9 0.67
(0.33–1.34)
2. Dad UN – MZ Cotwin AD 21.6 1.42
(0.81–2.51)
12.3 1.57
(0.74–3.34)
9.9 1.25
(0.57–2.72)
8.0 1.04
(0.44–2.43)
3. Dad UN – DZ cotwin AD 14.5 0.88
(0.48–1.61)
5.0 0.58
(0.23–1.47)
3.5 0.40
(0.14–1.13)
3.5 0.43
(0.15–1.24)
4. UN/UN 13.8 1.00 6.4 1.00 6.3 1.00 5.6 1.00
Prenatal risk
Smoked during pregnancy 25.4 1.69**
(1.19–2.40)
10.7 1.32
(0.78–2.23)
11.4 1.72*
(1.03–2.88)
8.7 1.30
(0.74–2.31)
Drank before knew pregnant 20.6 0.84
(0.55–1.26)
10.5 0.74
(0.40–1.34)
9.6 0.67
(0.36–1.24)
8.9 0.71
(0.36–1.36)
Drank after knew pregnant 25.2 1.64*
(1.07–2.51)
15.7 3.16**
(1.67–5.99)
14.8 3.39**
(1.80–6.37)
14.2 3.74**
(1.90–7.34)
Parental psychopathology
Paternal DSM-III-R nicotine dependence 20.2 1.19
(0.86–1.68)
9.5 1.30
(0.77–2.19)
9.0 1.39
(0.81–2.39)
8.1 1.59
(0.87–2.91)
Maternal DSM-IV alcohol dependence 29.1 1.62
(0.95–2.76)
14.3 1.56
(0.73–3.34)
14.6 1.71
(0.85–3.43)
13.6 1.92
(0.90–4.10)
Maternal DSM-IV ADHD 43.0 4.31**
(2.57–7.23)
26.4 5.71**
(2.98–10.93)
20.3 4.27**
(2.21–8.23)
17.7 4.21**
(2.08–8.49)
^

AD=alcohol dependence. Multivariate model covariates included based on Hosmer & Lemeshow39 criteria.

Adjusted multivariate model covariates (not in table): Child gender (male) remained significant (p<.01) for all ADHP categories. Divorce was non-significant for ADHP-4B (p=.25), ADHP-6B (p=.23), or ADHP-4N (p=.09) in the multivariate model; however it remained significant for the multivariate model of ADHP-6B (p=.04).

*

p<.05

**

p<.01

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