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. Author manuscript; available in PMC: 2011 Jun 23.
Published in final edited form as: Arch Phys Med Rehabil. 2011 May;92(5):818–823. doi: 10.1016/j.apmr.2010.12.008

Table 2.

Comparison of Classifications of Depression Status Based on PHQ-9 Scores and DIF-Corrected Scores

Score Cutpoints PHQ-9 Scores Corrected for DIF
Classification PHQ-9 Logit Scores No. Percentage No. Percentage
Minimal 0–4 <0.28 242 66.5 244 67.0
Mild 5–9 0.28–0.86 62 16.8 60 16.2
Moderate 10–14 0.87–1.36 31 8.5 33 9.1
Moderately severe 15–19 1.37–1.84 21 5.8 17 4.7
Severe ≥20 ≥1.85 9 2.5 11 3.0