Is Chronic Whiplash-Associated Disorder Associated with Central Nervous System Impairments? A Controlled Observational Study in a Lithuanian Cohort
Bibliographic record
Abstract
Background/Objectives: The aim of this study was to investigate the natural course of a whiplash-associated disorder (WAD) in a Lithuanian population with low awareness of the condition. Methods: In this controlled observational study, 45 participants, enrolled during the acute period after motor vehicle accident, and 50 matched controls were followed up at 8 months. Clinical evaluation of WAD grades was combined with self-scored questionnaires for pain, WAD symptoms, disability, emotional state, and cognitive impairment. The Quebec Task Force Questionnaire was used to assess persistence or development of new symptoms at follow-up. Demographic and sick leave data were collected. Results: The WAD group showed a significant improvement in clinical signs and self-rated scores for pain and disability after 8 months and became largely comparable to the control group. However, only 13 out of 45 WAD participants were symptom-free at follow-up. Persistent neck pain and dizziness/unsteadiness as well as newly developed cognitive complaints were more frequent in the WAD group compared to controls, each reported by around a third of individuals. Logistic regression showed that new cognitive symptoms could be predicted by nausea/vomiting in the acute period and persisting neck pain at follow-up. None of the participants remained on sick leave at follow-up. Conclusions: In a country with low awareness of WAD, a larger proportion of individuals remain symptomatic months after acute whiplash injury but maintain their ability to work. The emergence of new cognitive complaints may suggest concomitant central nervous system involvement.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".