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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Drug Alcohol Depend. 2014 Jan 24;137:68–75. doi: 10.1016/j.drugalcdep.2014.01.005

Table 4.

Statistics for discriminant analyses for structures found with significantly smaller volumes in early risk versus control subjects.

Model Variables Test of group means
Summary of canonical discriminant function
Wilks’ lambda F p Standardized coefficient Eigen-value Canonical correlation Wilks’ lambda χ2 p % of original grouped cases correctly classified
1A Left frontal volume 0.930 7.88 0.06 −9.419a 0.076 0.265 0.930 7.56 0.006 56.6
1B Left frontal volume 0.915 9.65 0.002 −0.455 0.549 0.595 0.646 44.82 <0.001 78.3
Total gray volume 0.970 3.17 0.078 Excl.
CDV 0.759 34.61 <0.001 0.739
PY 0.874 14.98 <0.001 0.463
FH 0.950 3.17 0.021 Excl.
1C Left frontal volume 0.919 8.15 0.005 −0.496 0.457 0.560 0.686 34.47 <0.001 77.4
Total gray volume 0.976 2.25 0.137 Excl.
CDV 0.778 26.59 <0.001 0.681
PY 0.874 13.67 <0.001 0.437
FHD 0.990 0.90 0.347 Excl.
2A Left superior frontal volume 0.915 9.65 0.002 −8.968a 0.093 0.291 0.915 9.185 0.002 58.5
2B Left superior frontal volume 0.930 7.88 0.006 −0.455 0.549 0.595 0.646 44.82 <0.001 81.1
Total gray volume 0.970 3.17 0.078 0.891
CDV 0.750 34.61 <0.001 0.739
PY 0.874 14.98 <0.001 0.463
FH 0.950 5.49 0.04 Excl.
2C Left superior frontal volume 0.936 6.40 0.013 −0.404 0.493 0.541 0.780 31.64 <0.001 81.1
Total gray volume 0.976 2.25 0.137 Excl.
CDV 0.778 26.59 0.013 0.695
PY 0.874 13.37 <0.001 0.435
FHD 0.990 0.90 0.347 Excl.

CDV, cumulative lifetime drink volume; PY, pack-year; FH, Any Parent Diagnosis for Alcohol Abuse or Dependence; FHD, family history density; Excl., variable excluded from final model.

a

Unstandardized coefficient due to model containing a single factor.