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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Eur Neuropsychopharmacol. 2011 Sep 14;22(3):183–199. doi: 10.1016/j.euroneuro.2011.07.010

Table 1.

Sociodemographic measures by baseline QIDS-SR

Measure Analyses
Baseline QIDS-SR16
 Bonferroni Correction
Mild
N=81		 Moderate
N=238		 Severe
N=260		 Very severe
N=67		 Test statistic p-
value		 Mild vs.
Moderate		 Mild vs.
Severe		 Mild vs.
Very
severe		 Moderate
vs. Severe		 Moderate
vs. Very
severe		 Severe
vs. Very
severe
% % % %
Age χ2(6)=12.81 0.0461 0.7968 0.0635 0.0497 0.0328 0.0571 0.6818
   18–29 14.8 18.1 21.9 25.4
   30–54 56.8 55.0 60.8 61.2
   55–75 28.4 26.9 17.3 13.4
Sex χ2(3)=24.73 <.0001 0.1017 0.0005 <.0001 0.0123 0.0004 0.0363
   Male 48.1 37.8 27.3 14.9
   Female 51.9 62.2 72.7 85.1
Race p<0.01 0.1002
   White 70.1 61.9 73.2 59.1
   Black 27.3 31.2 22.0 34.8
   Other 2.6 6.9 4.8 6.1
Hispanic 17.3 15.5 15.8 11.9 χ2(3)=0.86 0.8349
Employed 59.3 50.0 49.2 32.8 χ2(3)=10.52 0.0147 0.1495 0.1148 0.0014 0.8638 0.0128 0.0163
Mean (SD) Mean (SD) Mean (SD) Mean (SD)
Age 46.5 (13.4) 44.2 (13.0) 40.8 (12.6) 41.6 (12.4) F(3, 642)=5.59 0.0009 0.1605 0.0004 0.0232 0.0030 0.1520 0.6179
Education 14.1 (3.0) 13.8 (2.9) 13.6 (3.1) 13.5 (2.8) F(3, 624)=0.82 0.4804
Monthly
Household
income		 3598 (6119) 2726 (4096) 2278 (3413) 1781 (2261) χ2(3)=13.71 0.0033 0.0408 0.0041 0.0008 0.3208 0.0257 0.0717

Note: Chi-square for continuous measures indicates Kruskal-Wallis test.

Bold indicates significant (p <.05 for uncorrected analyses, p <.0083 for after Bonferroni correction.QIDS-SR16 categories: mild = 0–10, moderate = 11–15, severe = 16–20, very severe = 21–27.

Abbreviations: QIDS-SR16, 16 item quick inventory of depressive symptomatology – self-rated.