Table 3.
Test Scores and Group Differences for IP Speed Measures
| HIV M (SD) |
PD-on M (SD) |
C M (SD) |
F (2,71) value |
p-value | Effect Size (η2p) |
Pairwise Comparisons Groups [95% CId] p-value |
|
|---|---|---|---|---|---|---|---|
| SDMT a
CI] |
−1.22 (1.09) [−1.68, −0.77] |
−0.35 (1.16) [−0.75, 0.06] |
−0.01 (1.04) [−0.50, 0.48] |
11.05 | <0.0001 | 0.24 | HIV < C [−1.54, −0.569] 0.0001 HIV < PD [−1.26, −0.380] 0.0001 PD = C [−0.703, 0.238] ns |
| 15 sec | −0.13 (0.75) [−0.47, 0.22] |
−0.26 (0.8) [−0.58, 0.06] |
−0.01 (1.05) [−0.39, 0.38] |
0.511 | 0.602 | 0.01 | |
| 30 sec | −1.35 (1.5) [−0.19, −0.82] |
−0.27 (1.35) [−0.76, 0.22] |
0.02 (1.03) [−0.57, 0.61] |
7.049 | 0.002 | 0.17 | HIV < C [−2.16, −0.58] 0.001 HIV > PD [−1.80, −0.360] 0.004 PD = C [−1.05, 0.48] ns |
| 45 sec | −1.1 (1.24) [−1.53, −0.67] |
−0.3 (0.97) [−0.7, 0.11] |
−0.01 (1.03) [−0.5, 0.47] |
6.316 | 0.003 | 0.15 | HIV < C [−1.73, −0.44] 0.001 HIV < PD [−1.39, −0.213] 0.008 PD = C [−1.91, 0.35] ns |
| 60 sec | −0.89 (1.51) [−1.42, −0.36] |
−0.46 (1.36) [−0.96, 0.04] |
−0.01 (1.02) [−0.61, 0.58] |
2.413 | 0.097 | 0.06 | HIV < C [−1.67, −0.080] 0.008 HIV = PD [−1.16, 0.296] ns PD = C [−1.22, 0.33] ns |
| 75 sec | −2.28 (1.76) [−2.98, −1.58] |
−0.33 (2.12) [−0.98, 0.32] |
−0.01 (1.01) [−0.79, 0.77] |
11.862 | <0.0001 | 0.25 | HIV < C [−3.32, −1.22] 0.0001 HIV < PD [−2.92, −0.10] 0.0001 PD = C [−1.34, 0.7] ns |
| 90 sec | −0.61 (1.12) [−1.03, −0.2] |
−0.18 (0.94) [−0.21, 0.56] |
−0.01 (1.05) [−0.98, 0.32] |
4.154 | 0.02 | 0.11 | HIV < C [−1.22, −0.02] 0.056 HIV < PD [−1.36, −0.23] 0.006 PD = C [−0.41, 0.79] ns |
| Color Namingb
[CI] |
−0.96 (1.46) [−1.45, −0.47] |
−0.21 (1.04) [−0.65, 0.24] |
−0.01 (1.05) [−0.53, 0.51] |
4.592 | 0.013 | 0.11 | HIV < PD [−1.44, −0.139] 0.018 HIV < C [−1.69, −0.279] 0.007 PD = C [−0.88, 0.49] ns |
Abbreviations: HIV=HIV infection; PD=Parkinson’s disease; C=controls; M (SD)=mean (standard deviation); CI=95% confidence interval; CId= confidence interval for difference; Symbol Digit Modalities Test (SDMT; Smith, 1968, 1982); Color Naming (Golden, 1978).
a
repeated-measures ANOVA and follow-up MANOVA.
b
ANOVA and using standardized Z scores (age- and education-corrected) comparing HIV, PD-on, and C. (M)ANOVAs pairwise comparisons with LSD adjustment for multiple comparisons.