AMAP Greenland and the Faroe Islands 1997-2001
Confounder / covariate
Pearson (P), or Spearman
correlation coefficient (S), or
T-test (as applicable)
P value
(two-tailed)
All children
(N=500)
Subcohort B
(N=233)
All children
(N=500)
Subcohort B
(N=233)
Duration of gestation (in days)
(P) 0.004
(P) 0.008
0.921
0.908
Birth weight (in g)
(P) 0.025
(P) –0.080
0.575
0.222
Percentile of birth weight*
(S) 0.026
(S) –0.144
0.565
0.027
Corrected age at NOS (in days)
(P) -0.060
(P) -0.108
0.180
0.099
Apgar 5 minutes
(S) 0.042
(S) 0.033
0.345
0.616
Neonatal illness (no / yes)*
(T) –0.738
(T) 0.102
0.461
0.919
Head circumference (OFC) at NOS
(P) –0.067
(P) –0.120
0.135
0.068
Percentile of OFC at NOS*
(S) –0.113
(S) –0.147
0.012
0.025
Body length at NOS
(P) 0.083
(P) –0.054
0.065
0.414
Percentile of body length at NOS*
(S) –0.114
(S) –0.147
0.011
0.025
Icterus at NOS (no / yes)
(T) 1.569
(T) 0.491
0.117
0.624
Examiner (A / B )
(T) 9.473
---
<0.001
---
Date of examination
(P) 0.159
(P) 0.151
<0.001
0.022
Time (during day) of examination
(P) 0.080
(P) 0.083
0.081
0.215
Interval between meal and examination
(P) 0.244
(P) 0.135
<0.001
0.045
Stability of states (no / yes)*
(T) –3.902
(T) –1.962
<0.001
0.090
Maternal age
(P) 0.029
(P) –0.140
0.513
0.033
BMI
(S) -0.058
(S) –0.161
0.193
0.014
Smoking of mother during pregnancy*
(S) -0.070
(S) 0.005
0.118
0.938
Alcohol of mother during pregnancy*
(S) –0.075
(S) –0.050
0.093
0.448
Education of mother*
(S) –0.005
(S) 0.025
0.912
0.705
Education of father*
(S) –0.023
(S) –0.013
0.615
0.841
Level of father´s / parents´ occupation and
profession*
1(T) 1.906
²(T) 2.386
(T) 2.667
(T) 3.524
0.057
0.017
0.008
0.001
Parity
(S) 0.060
(S) –0.111
0.184
0.090
Early spontaneous abortions (no / yes)
(T) 1.888
(T) 1.437
0.061
0.152
Other non-obstetrical diseases during
pregnancy (no / yes)*
(T) –2.199
(T) – 4.380
0.034
0.003
Obstetric Optimality Score
(P) –0.063
(P) 0.015
0.156
0.853
* For further details: see text
1 : T-value resp. significance level for correlation with father´s occupation / profession
2 : T-value resp. significance level for correlation with highest parents´ occupation / profession
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