Table 1.
AORs Obtained From Multiple Logistic Regression Models of Two Threshold Definitions of Clinically Relevant Increases in CES-D-12 Depressive Symptoms (ie, ≥0.5 SD [Panel A] and ≥1.0 SD [Panel B]) at 1-Year (n = 2,014) and 5-Year (n = 1,516) Postbaseline
Risk Factor | 1 y AOR | 1 y AOR Adjusted for Baseline CES-D-12 Scores | 1 y AOR Adjusted for Baseline CES-D-12, MMSE, and Eight SF-36 Scale Scores | 5 y AOR | 5 y AOR Adjusted for Baseline CES-D-12 Scores | 5 y AOR Adjusted for Baseline CES-D-12, MMSE, and Eight SF-36 Scale Scores |
Panel A: Using the ≥0.5 SD threshold definition for clinically relevant increases | ||||||
Treatment group | ||||||
Memory | 0.809 | 0.798 | .827 | 0.782 | 0.776 | .774 |
Reasoning | 0.857 | 0.881 | .875 | 1.034 | 1.074 | 1.056 |
Speed-of-processing | 0.700 (p = .012) | 0.703 (p = .013) | .697 (p = .013) | 0.698 (p = .023) | 0.703 (p = .027) | .693 (p = .027) |
Panel B: Using the ≥1.0 SD threshold definition for clinically relevant increases | ||||||
Treatment group | ||||||
Memory | 0.711 | 0.707 | .736 | 0.772 | 0.770 | .771 |
Reasoning | 0.874 | 0.889 | .884 | 1.131 | 1.157 | 1.126 |
Speed-of-processing | 0.669 (p = .039) | 0.672 (p = .042) | .667 (p = .041) | 0.651 (p = .059) | 0.656 (p = .064) | .668 (p = .083) |
Note: AORs = adjusted odds ratios; CES-D-12 = Center for Epidemiological Studies–Depression scale, 12-Item Version; MMSE = Mini-Mental State Examination; SF-36 = Short Form 36-Item Health-Related Quality of Life (and includes the physical functioning [10 items], role limitations due to physical functioning [four items], bodily pain [two items], general health perceptions [five items], vitality [four items], social functioning [two items], role limitations due to emotional problems [three items], and mental health [five items] scales).