Table 5.
Stroop Word-Color Cognitive Function Data
| Variable | Group | Number | Time (wk) | p-value | |||
|---|---|---|---|---|---|---|---|
| 0 | 4 | 8 | |||||
| Word (counts) | PLA | 27 | 109.8 ± 16.9 | 113.6 ± 17.2 | 116.2 ± 17.5 | Group | 0.33 |
| PWS | 27 | 107.7 ± 11.4 | 110.6 ± 10.9 | 115.3 ± 10.9 | Time | <0.001 | |
| PWS + S | 26 | 102.3 ± 11.2 | 108.2 ± 17.0 | 112.4 ± 16.1 | G x T | 0.45 | |
| Mean ± SD | 106.7 ± 13.7 | 110.8 ± 15.3* | 114.7 ± 15.0*^ | ||||
| Color (counts) | PLA | 27 | 80.8 ± 10.6c | 83.2 ± 11.8c | 85.7 ± 12.5*c | Group | 0.35 |
| PWS | 27 | 78.2 ± 9.4 | 83.6 ± 9.6*c | 86.7 ± 10.1*^c | Time | <0.001 | |
| PWS + S | 26 | 77.0 ± 10.4a | 79.7 ± 9.8*ab | 82.1 ± 10.8*ab | G x T | 0.087l | |
| Mean ± SD | 78.7 ± 10.1 | 82.2 ± 10.5* | 84.9 ± 11.2*^ | ||||
| Word-Color (counts) | PLA | 27 | 54.1 ± 11.5c | 55.5 ± 11.5 | 58.5 ± 12.6*c | Group | 0.42 |
| PWS | 27 | 53.1 ± 5.9c | 56.7 ± 7.4* | 59.1 ± 7.6*c | Time | <0.001 | |
| PWS + S | 26 | 49.2 ± 11.1ab | 55.0 ± 9.6* | 55.6 ± 10.2*ab | G x T | 0.04q | |
Values are means ± standard deviations. Word, Color, and Word-Color counts were analyzed by MANOVA. MANOVA analysis revealed overall Wilks’ Lambda group (p = 0.83), time (p < 0.001), and group x time (p = 0.17). Greenhouse-Geisser time and group x time (G x T) interaction p-values are reported with univariate group p-values. q represents quadratic effect and l represents linear p-value from univariate ANOVA. * represents p < 0.05 difference from baseline. ^ represents p < 0.05 difference from wk 4. arepresents p < 0.05 from PLA. brepresents p < 0.05 from PWS. crepresents p < 0.05 from PWS + S