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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: Hum Brain Mapp. 2017 Jun 8;38(9):4370–4385. doi: 10.1002/hbm.23664

Table 2.

Descriptive Statistics by Imaging Site

Columbia Harvard Michigan UTSW Statistic
MDD+ MDD− MDD+ MDD− MDD+ MDD− MDD+ MDD−
n n n n n n n n
Group 44 12 34 17 33 9 59 14 χsite(3) = 3.74, p = 0.29
Course χsite(3) = 6.18, p = 0.10
 Recurrent 36 -- 26 -- 32 -- 51 --
 Single Episode 8 -- 8 -- 1 -- 8 --
Gender χsite(3) = 2.59, p = 0.47
 M 21 4 16 8 11 3 20 8
 F 23 8 18 9 22 6 39 6
Education Level χsite(3) = 5.78, p = 0.12
≥16 years 26 7 15 9 14 5 21 8
< 16 years 16 5 19 8 19 4 38 6
Lifetime Psychopathology
 Panic Disorder 9 0 6 0 5 0 7 0 χsite(3) = 1.40, p = 0.71
 OCD 0 0 2 0 0 0 4 0 χsite(3) = 5.20, p = 0.16
 Specific Phobia 8 0 6 0 11 0 7 0 χsite(3) = 6.46, p = 0.09
 Social Phobia 2 0 0 0 4 0 9 0 χsite(3) = 4.99, p = 0.17
 PTSD 6 0 1 0 11 0 9 0 χsite(3) = 11.97, p = 0.01
 Anorexia 1 0 0 0 0 0 1 0 χsite(3) = 1.39, p = 0.71
 Bulimia 0 1 3 0 0 0 1 0 χsite(3) = 5.51, p = 0.14
 Alcohol Use Disorder 6 0 2 1 10 0 15 0 χsite(3) = 8.78, p = 0.03
 Illicit Use Disorder 5 1 3 0 6 0 12 0 χsite(3) = 3.00, p = 0.39
Mean (SD)
Range		 Mean (SD)
Range		 Mean (SD)
Range		 Mean (SD)
Range		 Mean (SD)
Range		 Mean (SD)
Range		 Mean (SD)
Range		 Mean (SD)
Range
Number of Episodes^& 5.32 (6.23)
1−20		 -- 6.18 (6.31)
1–20		 -- 9.36 (6.74)
1–20		 -- 9.14 (7.60)
1–20		 -- Fsite(3,166) = 2.85, p = 0.04, Post Hoc: M > C, M > H
Age 34.45 (10.52)
18–61		 36.92 (13.23)
18–64		 35.44 (14.69)
18–60		 39.24 (18.46)
18–65		 34.36 (13.11)
18–58		 43.78 (15.19)
23–62		 41.37 (11.40)
19–63		 32.71 (11.75)
20–57		 Fsite(3,214) = 0.37, p = 0.77, FDX(1,214) = 0.69, p = 0.41, Fint(3,214) = 3.30, p = 0.02
Total Brain Volume* 1.15 (0.14)
0.85–1.54		 1.14 (0.13)
0.99–1.44)		 1.12 (0.10)
0.91–1.41		 1.12 (0.11)
0.87–1.29		 1.12 (0.12)
0.92–1.43		 1.09 (0.15)
0.90–1.28		 1.11 (0.11)
0.85–1.39		 1.19 (0.16)
0.97–1.54		 Fsite (3,214) = 1.23, p = 0.30, FDX(1,214) = 0.24, p = 0.62, Fint(3,214) = 1.82, p = 0.14
Quick Inventory of Depression Symptoms 19.00 (2.98)
14–24		 1.50 (1.13)
0–4		 17.65 (2.89)
14–27		 1.12 (1.05)
0–3		 18.67 (3.27)
14–27		 2.22 (1.99)
0–6		 17.28 (2.43)
14–24		 1.14 (1.29)
0–4		 Fsite(3, 213) = 2.11, p = 0.10, FDX(1,213) = 1,561, p < 0.01, Fint(3,213) = 0.51, p = 0.68

Note:

^

For ANOVA, data was log10 +1 transformed due to positive skew;

&

Data was windsored to 20 for reporting descriptive statistics.

*

105 and millimeters3 2 participants at Columbia declined to report education.