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. 2012 Jan 3;7(1):e28912. doi: 10.1371/journal.pone.0028912

Table 1. Demographic characteristics of depressive subtypes of women with unipolar MDD.

Depressive Subtype
Characteristics Healthy Controls (n = 44) Undifferentiated (n = 22) Atypical (n = 16) Melancholic (n = 51)
Age (yrs) 34.7±6.8 38.2±5.4b 34.3±7.8 34.3±7.0
Body mass index (kg/cm2) 24.2±3.7 27.2±6.2b 28.9±7.1a 25.8±6.0
Weight (kg) 68.0±10.6 74.2±18.8 80.5±21.2a 70.4±17.3
White race 86.4% 90.9% 75.0% 90.2%
Years of education 16.3±2.1 16.9±2.0 15.1±1.9a 16.7±1.9
Married (%) 50.0% 54.6% 18.8%a 31.4%
Ever Smoked 31.8% 27.3% 50.0% 28.1% (9/32)
Age at Menarche 13.0±1.6 (n = 43) 12.7±1.6(n = 20) 11.9±1.6a(n = 15) 12.5±1.6 (n = 47)
Previous pregnancies 1.23±1.36 1.73±1.70 1.56±2.13 0.88±1.31
Contraceptive Pill Users 36.4% 18.2% 31.3% 35.3%
Estimated Total Calcium Intake (mg/day) 1408±755(n = 41) 1431±844(n = 19) 1571±699(n = 14) 1315±561(n = 45)
Alcohol Consumption (g/week) 6.9±11.6(n = 41) 5.0±4.8 3.9±6.1 4.3±6.2
Distance covered in the Cooper test (m) 1438±280(n = 23) 1252±253(n = 11) 1129±192a(n = 7) 1409±370(n = 20)

Values are reported as mean ± SD or percent.

Sample size in parenthesis, unless otherwise indicated.

Significant comparisons, assessed as p≤.05 nominal value.

Overall: overall test.

a

Atypical differs from control.

b

Undifferentiated differs from control.