Table 2. Correlation coefficients (Pearson and Spearman) between PL VPT (log lux) and questionnaire scores among TBI and non-TBI control participants.
| TBI (n=42) | Non-TBI controls (n=45) | |||
|---|---|---|---|---|
| Spearman ρ | P values | Spearman ρ | P values | |
| PHQ-9 | −0.385 | 0.01* | 0.151 | 0.32 |
| PCS-EN | −0.401 | 0.009* | −0.128 | 0.40 |
| SF-12v2 | ||||
| PCS | −0.023 | 0.89 | −0.036 | 0.82 |
| MCS | −0.040 | 0.81 | −0.151 | 0.34 |
| Pearson r | P values | Pearson r | P values | |
|---|---|---|---|---|
| BTACT Z-scores | ||||
| Word list recall | 0.077 | 0.64 | −0.177 | 0.24 |
| Digits span backward | 0.312 | 0.05* | −0.098 | 0.52 |
| Number series | 0.417 | 0.007* | −0.166 | 0.28 |
| Category fluency | 0.261 | 0.10 | −0.016 | 0.92 |
| Backward counting | 0.111 | 0.50 | 0.015 | 0.92 |
| Composite | 0.310 | 0.05 | −0.128 | 0.40 |
SF-12v2, a health survey measuring physical and mental health whose domains contribute to PCS and MCS scores.
Significance (p<0.05) denoted by *.
BTACT, Brief Test of Adult Cognition by Telephone; MCS, Mental Component Summary; PCS, Physical Component Summary; PCS-EN, Pain Catastrophizing Scale; PHQ-9, Patient Health Questionnaire-9; PL, plano lens; SF-12v2, Short-Form 12-Item Survey-version 2; TBI, traumatic brain injury; VPT, visual photosensitivity threshold.