Chronic Pain Syndromes in Old Age and the Role of Substance P in this Pathology
Notice bibliographique
Résumé
ABSTRACT AIM. To investigate chronic pain syndromes in old age and evaluate the clinical significance of substance P in this pathology. MATERIAL AND METHODS. The study enrolled 68 patients over the age of 75 years with the presence of musculoskeletal pain of any origin for at least 3 months. The mean age of the patients reached 81.9 ± 5.8 years (from 75 to 100 years), most of them were women (85.3%). In this study, the severity of pain was assessed using a visual analogue scale (VAS), and the type of pain was analyzed using questionnaires and scales: DN4, PainDetect, Fibromyalgia Identification Questionnaire (FIRST), Central Sensitization Questionnaire, McGill Pain Questionnaire. The blood concentration of substance P was determined by enzyme immunoassay. RESULTS AND DISCUSSION. The severity of pain syndrome on the VAS scale reached 6.3 ± 2.2 points. The mean scores for DN4 were 3.9 ± 2.1 points, and for PainDetect — 14.7 ± 9.4 points. The mean value of the FIRST questionnaire for diagnosing fibromyalgia was 3.5 ± 1.6 points, and the McGill questionnaire was 69.8 ± 43.7 points. The mean value of the central sensitization scale reached 44.3 ± 16.7 points. Pain syndrome was more severe in women: the mean VAS value in women was 6.4 ± 2.3, in men — 5.1 ± 1.2 points (p = 0.02). The severity of the neuropathic component of the pain syndrome in women was also higher: DN4 scores in women were 4.0 ± 2.1, and in men — 2.9 ± 1.7 points (p = 0.08), and PainDetect — 15.7 ± 9.4 and 8.6 ± 6.4 points, respectively (p = 0.02). The mean values of the screening questionnaire for diagnosing fibromyalgia in women reached 3.7 ± 1.5 points, and in men — 2.7 ± 1.5 points (p = 0.07). In the group of women, the mean McGill questionnaire scores were 74.2 ± 45.2, in men — 45.3 ± 23.6 points (p = 0.006). The mean values of the central sensitization questionnaire for women were: 46.1 ± 16.3, and for men — 34.2 ± 15.5 points (p = 0.03). However, no significant differences in the severity of depression were recorded in women and men: 6.2 ± 2.8 and 5.0 ± 3.4 points, respectively (p = 0.3). The mean concentration of substance P in the study group was 222.6 ± 92.9 pg/ml, varying from 74 to 529 pg/ml. In men, the mean blood concentration of substance P reached 267.1 ± 85.2 pg/ml, in women — 214.2 ± 92.7 pg/ml (p = 0.02). An inverse correlation was registered between the blood concentration of substance P and the age of patients (r = −0.31; p = 0.02). No significant relationships were found between the blood concentration of substance P and the values of all pain questionnaires. Significant correlations were registered between VAS and DN4 (r = 0.29; p = 0.01), PainDetect (r = 0.41; p = 0.004), McGill questionnaire (r = 0.53; p < 0.0001) and central sensitization questionnaire (r = 0.3; p = 0.01). There was no significant correlation between the severity of pain according to VAS and the severity of depression (r = 0.16; p = 0.21). The severity of depression correlated with indicators of DN4 (r = 0.31; p = 0.01), FIRST (r = 0.26; p = 0.03), McGill questionnaire (r = 0.29; p = 0.02) and central sensitization questionnaire (r = 0.5; p < 0.0001). There was a direct correlation between the age of patients and indicators of DN 4 (r = 0.24; p = 0.05) and the central sensitization questionnaire (r = 0.25; p = 0.04). CONCLUSION. The study results suggest the presence of severe chronic pain syndrome of various types in old patients and longlivers. Significant relationships were found between pain indicators assessed using different scales and questionnaires. In this study, no significant correlations were established between the blood concentration of substance P and pain parameters. KEYWORDS: pain, old age, substance P, questionnaires, scales, neuropathic, depression
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».