{"id":2070,"date":"2014-09-20T17:01:51","date_gmt":"2014-09-20T16:01:51","guid":{"rendered":"http:\/\/www.mimiryudo.com\/blog\/?p=2070"},"modified":"2016-06-23T16:48:28","modified_gmt":"2016-06-23T15:48:28","slug":"fmc-hyponatremies-sous-anti-depresseurs","status":"publish","type":"post","link":"https:\/\/www.mimiryudo.com\/blog\/2014\/09\/fmc-hyponatremies-sous-anti-depresseurs\/","title":{"rendered":"[FMC] Hyponatr\u00e9mies sous anti-d\u00e9presseurs"},"content":{"rendered":"<p>Les IRS\u00a0sont effectivement associ\u00e9s \u00e0 un sur-risque d\u2019hyponatr\u00e9mie par rapport aux autres antid\u00e9presseurs (OR = 3,3, IC95% [1,3 \u2013 8,6]) (1). L\u2019incidence des hyponatr\u00e9mies sous IRS varie selon les \u00e9tudes, de 0,4 % \u00e0 12 % (2)\u00a0; elles sont d\u00e9crites \u00ab\u00a0rares\u00a0\u00bb dans les monographies des IRS (&lt; 0,1 %).<\/p>\n<p>Des \u00e9tudes de pharmaco-\u00e9pid\u00e9miologie ont identifi\u00e9 plusieurs facteurs d\u2019hyponatr\u00e9mies sous IRS\u00a0: \u00e2ge &gt; 65 ans (1), sexe f\u00e9minin (2), IMC bas, natr\u00e9mie basse avant l\u2019introduction du m\u00e9dicament (3), saison estivale, introduction r\u00e9cente (3 semaines) (3,4), association avec d\u2019autres m\u00e9dicaments associ\u00e9s \u00e0 des hyponatr\u00e9mies (diur\u00e9tiques thiazidiques, neuroleptiques, antid\u00e9presseurs tricycliques&#8230;) (2).<\/p>\n<p>Parmi les antid\u00e9presseurs signal\u00e9s par la Haute Autorit\u00e9 de Sant\u00e9, les hyponatr\u00e9mies ont \u00e9t\u00e9 d\u00e9crites\u00a0:<\/p>\n<ul>\n<li>Sous tous les inhibiteurs s\u00e9lectifs de recapture de la s\u00e9rotonine (ISRS)\u00a0: fluox\u00e9tine (5), parox\u00e9tine (6), sertraline (7), citalopram (8), escitalopram (9), fluvoxamine (10)\u00a0;<\/li>\n<li>Sous les inhibiteurs de la recapture de la s\u00e9rotonine et de la noradr\u00e9naline (IRSNa), \u00e0 l\u2019exception du milnacipran\u00a0: dulox\u00e9tine (11), venlafaxine (12)\u00a0;<\/li>\n<li>Sous mirtazapine (13), mais pas sous agom\u00e9latine, mians\u00e9rine ou tianeptine (autres antid\u00e9presseurs) ;<\/li>\n<li>Sous certains imipraminiques\u00a0(clomipramine (14), amitryptiline (15), imipramine (16)), mais pas sous amoxapine, maprotiline, dosul\u00e9pine, dox\u00e9pine, trimipramine ;<\/li>\n<li>Sous IMAO s\u00e9lectif A (moclob\u00e9mide (17)), mais pas sous IMAO non s\u00e9lectif (iproniazide).<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<p>L\u2019hyponatr\u00e9mie refl\u00e8te une hyperhydratation intra-cellulaire. Le m\u00e9canisme d\u2019action\u00a0des hyponatr\u00e9mies sous ISRS n\u2019est que partiellement \u00e9lucid\u00e9, en lien avec une majoration de l\u2019action de l\u2019hormone anti-diur\u00e9tique (ADH). Certaines \u00e9tudes exp\u00e9rimentales ont montr\u00e9 que la s\u00e9rotonine majorait la s\u00e9cr\u00e9tion d\u2019ADH via les r\u00e9cepteurs 5-HT2 (18,19)\u00a0; d\u2019autres ne retrouvent pas cet effet (20). Arinzon sugg\u00e8re que le m\u00e9canisme soit multifactoriel\u00a0: augmentation de la s\u00e9cr\u00e9tion centrale d\u2019ADH, augmentation de l\u2019effet de l\u2019ADH au niveau de la m\u00e9dullaire r\u00e9nale, diminution du seuil de s\u00e9cr\u00e9tion de l\u2019ADH, interaction avec d\u2019autres m\u00e9dicaments par inhibition du CYP2D6 (4,11).<\/p>\n<p>Dans les cas cliniques rapport\u00e9s d\u2019hyponatr\u00e9mie sous ISRS (hyperhydratation intracellulaire, notamment c\u00e9r\u00e9brale) les patients \u00e9taient asymptomatiques ou pr\u00e9sentaient des faiblesses musculaires, c\u00e9phal\u00e9es, naus\u00e9es, vomissements, malaise, confusion, bradycardies, d\u00e9tresse respiratoire, \u00e9pilepsie, coma, d\u00e9c\u00e8s (2).<\/p>\n<p>Aucune surveillance d\u2019ionogramme n\u2019est pr\u00e9cis\u00e9e dans les monographies. Toutefois, ces hyponatr\u00e9mies sous ISRS pourraient impliquer de v\u00e9rifier la natr\u00e9mie avant l\u2019introduction du m\u00e9dicament et \u00e0 2-3 semaines, notamment dans les groupes \u00e0 risque. L\u2019hyponatr\u00e9mie se corrige parfois spontan\u00e9ment\u00a0; sinon, l\u2019arr\u00eat du traitement et la restriction hydrique permettent de corriger la natr\u00e9mie dans la plupart des cas en 2 semaines. Un relais par antid\u00e9presseur tricyclique peut \u00eatre propos\u00e9, en tenant compte de leurs potentiels effets cardiaques (2,21).<\/p>\n<p>Afin de pr\u00e9ciser la diff\u00e9rence d\u2019augmentation de risque d\u2019hyponatr\u00e9mie entre les divers antid\u00e9presseurs, une analyse cas\/non-cas a \u00e9t\u00e9 r\u00e9alis\u00e9e dans la Base Nationale de Pharmacovigilance sur la p\u00e9riode 2004-2013\u00a0: nous cherchons ainsi une diff\u00e9rence entre le taux d\u2019exposition de chaque antid\u00e9presseur parmi les cas (hyponatr\u00e9mies ou s\u00e9cr\u00e9tion inappropri\u00e9e d\u2019ADH) versus le taux d\u2019exposition de chaque antid\u00e9presseur parmi les non-cas (autres effets ind\u00e9sirables sur la m\u00eame p\u00e9riode). Nous retenons une diff\u00e9rence pour un odd-ratio sup\u00e9rieur \u00e0 1 dont l\u2019intervalle de confiance \u00e0 95 % ne contient pas 1.<\/p>\n<p>J&rsquo;ai utilis\u00e9 le m\u00eame principe dans mon <a title=\"Est-ce que angine + AINS = phlegmon ?\" href=\"http:\/\/www.mimiryudo.com\/blog\/2014\/08\/est-ce-que-angine-ains-phlegmon\/\" target=\"_blank\">billet sur les AINS<\/a>.<\/p>\n<table class=\" aligncenter\">\n<tbody>\n<tr>\n<td width=\"131\"><strong>Classe<\/strong><\/td>\n<td width=\"116\"><strong>M\u00e9dicament<\/strong><\/td>\n<td width=\"127\"><strong>Cas (n = 3397) (%)<\/strong><\/td>\n<td width=\"166\"><strong>Non-cas (n = 252\u00a0373) (%)<\/strong><\/td>\n<td width=\"154\"><strong>OR [IC 95%]<\/strong><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"6\" width=\"131\">Inhibiteur s\u00e9lectif de recapture de la s\u00e9rotonine<\/td>\n<td width=\"116\">Fluox\u00e9tine<\/td>\n<td width=\"127\">132 (3,9)<\/td>\n<td width=\"166\">1366 (0,5)<\/td>\n<td width=\"154\"><strong>7,4 [6,5 \u2013 8,5]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Parox\u00e9tine<\/td>\n<td width=\"127\">314 (9,2)<\/td>\n<td width=\"166\">2924 (1,2)<\/td>\n<td width=\"154\"><strong>8,7 [8,0 \u2013 9,5]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Sertraline<\/td>\n<td width=\"127\">85 (2,5)<\/td>\n<td width=\"166\">1007 (0,4)<\/td>\n<td width=\"154\"><strong>6,4 [5,5 \u2013 7,5]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Citalopram<\/td>\n<td width=\"127\">146 (4,3)<\/td>\n<td width=\"166\">1366 (0,5)<\/td>\n<td width=\"154\"><strong>8,3 [7,3 \u2013 9,3]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Escitalopram<\/td>\n<td width=\"127\">222 (6,5)<\/td>\n<td width=\"166\">2147 (0,9)<\/td>\n<td width=\"154\"><strong>8,1 [7,4 \u2013 9,0]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Fluvoxamine<\/td>\n<td width=\"127\">5 (0,15)<\/td>\n<td width=\"166\">104 (0,04)<\/td>\n<td width=\"154\"><strong>3,6 [1,9 \u2013 6,8]<\/strong><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\" width=\"131\">Inhibiteur de la recapture de la s\u00e9rotonine et de la noradr\u00e9naline<\/td>\n<td width=\"116\">Dulox\u00e9tine<\/td>\n<td width=\"127\">55 (1,6)<\/td>\n<td width=\"166\">771 (0,3)<\/td>\n<td width=\"154\"><strong>5,4 [4,4 \u2013 6,5]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Venlafaxine<\/td>\n<td width=\"127\">167 (4,9)<\/td>\n<td width=\"166\">2341 (0,9)<\/td>\n<td width=\"154\"><strong>5,5 [4,9 \u2013 6,2]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Milnacipran<\/td>\n<td width=\"127\">8 (0,2)<\/td>\n<td width=\"166\">295 (0,1)<\/td>\n<td width=\"154\"><strong>2,0 [1,2 \u2013 3,3]<\/strong><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"4\" width=\"131\">Autres antid\u00e9presseurs<\/td>\n<td width=\"116\">Mirtazapine<\/td>\n<td width=\"127\">61 (1,8)<\/td>\n<td width=\"166\">955 (0,4)<\/td>\n<td width=\"154\"><strong>4,8 [4,0 \u2013 5,8]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Agom\u00e9latine<\/td>\n<td width=\"127\">10 (0,3)<\/td>\n<td width=\"166\">182 (0,07)<\/td>\n<td width=\"154\"><strong>4,1 [2,6 \u2013 6,5]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Mians\u00e9rine<\/td>\n<td width=\"127\">44 (1,3)<\/td>\n<td width=\"166\">1214 (0,5)<\/td>\n<td width=\"154\"><strong>2,7 [2,2 \u2013 3,4]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Tianeptine<\/td>\n<td width=\"127\">65 (1,9)<\/td>\n<td width=\"166\">805 (0,3)<\/td>\n<td width=\"154\"><strong>6,1 [5,1 \u2013 7,3]<\/strong><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"8\" width=\"131\">Imipraminiques<\/td>\n<td width=\"116\">Clomipramine<\/td>\n<td width=\"127\">41 (1,2)<\/td>\n<td width=\"166\">841 (0,3)<\/td>\n<td width=\"154\"><strong>3,7 [2,9 \u2013 4,6]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Amitryptiline<\/td>\n<td width=\"127\">53 (1,5)<\/td>\n<td width=\"166\">1367 (0,5)<\/td>\n<td width=\"154\"><strong>2,9 [2,4 \u2013 3,5]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Imipramine<\/td>\n<td width=\"127\">2 (0,06)<\/td>\n<td width=\"166\">27 (0,01)<\/td>\n<td width=\"154\"><strong>5,5 [2,0 \u2013 15,4]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Amoxapine<\/td>\n<td width=\"127\">1 (0,03)<\/td>\n<td width=\"166\">21 (0,008)<\/td>\n<td width=\"154\">3,5 [0,8 \u2013 14,8]<\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Maprotiline<\/td>\n<td width=\"127\">5 (0,1)<\/td>\n<td width=\"166\">54 (0,02)<\/td>\n<td width=\"154\"><strong>6,9 [3,6 \u2013 13,3]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Dosul\u00e9pine<\/td>\n<td width=\"127\">2 (0,06)<\/td>\n<td width=\"166\">87 (0,03)<\/td>\n<td width=\"154\">1,7 [0,6 \u2013 4,7]<\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Dox\u00e9pine<\/td>\n<td width=\"127\">1 (0,03)<\/td>\n<td width=\"166\">25 (0,01)<\/td>\n<td width=\"154\">3,0 [0,7 \u2013 12,4]<\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Trimipramine<\/td>\n<td width=\"127\">2 (0,06)<\/td>\n<td width=\"166\">49 (0,02)<\/td>\n<td width=\"154\"><strong>3,0 [1,1 \u2013 8,3]<\/strong><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" width=\"131\">IMAO<\/td>\n<td width=\"116\">Moclob\u00e9mide<\/td>\n<td width=\"127\">4 (0,1)<\/td>\n<td width=\"166\">65 (0,03)<\/td>\n<td width=\"154\"><strong>4,6 [2,2 \u2013 9,4]<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"116\">Iproniazide<\/td>\n<td width=\"127\">0<\/td>\n<td width=\"166\">28 (0,01)<\/td>\n<td width=\"154\">Non applicable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Enfin, les monographies rapportent une fr\u00e9quence moindre d\u2019effets cardiovasculaires des ISRS par rapport aux antid\u00e9presseurs tricycliques. Des cas d\u2019hypotension orthostatiques ont \u00e9t\u00e9 rapport\u00e9s. Il ne semble pas y avoir de cas d\u2019isch\u00e9mie c\u00e9r\u00e9brale ou d\u2019infarctus du myocarde.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Au total<\/strong>, tous les antid\u00e9presseurs sont statistiquement associ\u00e9s \u00e0 la survenue d\u2019une hyponatr\u00e9mie\u00a0; d\u2019apr\u00e8s notre analyse de la Base Nationale de Pharmacovigilance, les ISRS semblent les plus associ\u00e9s, suivis par les IRSNa et certains imipraminiques. Cette derni\u00e8re classe est par contre plus cardiotoxique.<\/p>\n<p>Dans la litt\u00e9rature, milnacipran, agom\u00e9latine, mians\u00e9rine, tianeptine, maprotiline et trimipramine ne sont pas associ\u00e9s \u00e0 une hyponatr\u00e9mie\u00a0; ces mol\u00e9cules le sont pourtant dans la Base nationale de Pharmacovigilance.<\/p>\n<p>Certains imipraminiques ne sont pas signal\u00e9s comme associ\u00e9s \u00e0 la survenue d\u2019hyponatr\u00e9mie dans la litt\u00e9rature ou dans la Base Nationale de Pharmacovigilance, mais il peut s\u2019agir d\u2019un manque de puissance d\u00fb \u00e0 leur faible utilisation.<\/p>\n<p>Les cons\u00e9quences cliniques d\u00e9pendent de l\u2019importance de l\u2019hyponatr\u00e9mie\u00a0; les effets sont g\u00e9n\u00e9ralement r\u00e9versibles sous 2 semaines apr\u00e8s l\u2019arr\u00eat de la mol\u00e9cule.<\/p>\n<p>Plusieurs facteurs de risque d\u2019hyponatr\u00e9mie sous IRSR ont \u00e9t\u00e9 identifi\u00e9s (femme, \u00e2ge &gt; 65 ans, IMC bas, natr\u00e9mie initiale basse, prise d\u2019autre m\u00e9dicament pourvoyeur d\u2019hyponatr\u00e9mie\u2026)\u00a0; ces facteurs pourraient inciter \u00e0 surveiller le ionogramme au cours du premier mois de l\u2019instauration d\u2019un antid\u00e9presseur dans ces populations \u00e0 risque.<\/p>\n<p>&nbsp;<\/p>\n<p>_________<\/p>\n<p>R\u00e9f\u00e9rences :<\/p>\n<p>1. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Movig KLL, Leufkens HGM, Lenderink AW, van den Akker VGA, Hodiamont PPG, Goldschmidt HMJ, et al. Association between antidepressant drug use and hyponatraemia: a case-control study. Br J Clin Pharmacol. avr 2002;53(4):363-9.<\/p>\n<p>2. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Wright SK, Schroeter S. Hyponatremia as a complication of selective serotonin reuptake inhibitors. J Am Acad Nurse Pract. janv 2008;20(1):47-51.<\/p>\n<p>3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fabian TJ, Amico JA, Kroboth PD, Mulsant BH, Corey SE, Begley AE, et al. Paroxetine-induced hyponatremia in older adults: a 12-week prospective study. Arch Intern Med. 9 f\u00e9vr 2004;164(3):327-32.<\/p>\n<p>4. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Arinzon ZH, Lehman YA, Fidelman ZG, Krasnyansky II. Delayed recurrent SIADH associated with SSRIs. Ann Pharmacother. ao\u00fbt 2002;36(7-8):1175-7.<\/p>\n<p>5. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Hwang AS, Magraw RM. Syndrome of inappropriate secretion of antidiuretic hormone due to fluoxetine. Am J Psychiatry. mars 1989;146(3):399.<\/p>\n<p>6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Chua TP, Vong SK. Hyponatraemia associated with paroxetine. BMJ. 9 janv 1993;306(6870):143.<\/p>\n<p>7. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Kessler J, Samuels SC. Sertraline and hyponatremia. N Engl J Med. 15 ao\u00fbt 1996;335(7):524.<\/p>\n<p>8. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Miehle K, Paschke R, Koch CA. Citalopram Therapy as a Risk Factor for Symptomatic Hyponatremia Caused by the Syndrome of Inappropriate Secretion of Antidiuretic Hormone (SIADH): A Case Report. Pharmacopsychiatry. juill 2005;38(4):181-2.<\/p>\n<p>9. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Covyeou JA, Jackson CW. Hyponatremia associated with escitalopram. N Engl J Med. 4 janv 2007;356(1):94-5.<\/p>\n<p>10. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Gabriel A. Serotonin reuptake inhibitor and fluvoxamine-induced severe hyponatremia in a 49-year-old man. Case Rep Med. 2009;2009:585193.<\/p>\n<p>11. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Choi J-S, Lee HW, Lee JY, Jung HY. Rapid-onset hyponatremia induced by duloxetine in a middle-aged male with depression and somatic symptoms. Psychiatry Investig. mars 2012;9(1):83-4.<\/p>\n<p>12. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Masood GR, Karki SD, Patterson WR. Hyponatremia with venlafaxine. Ann Pharmacother. janv 1998;32(1):49-51.<\/p>\n<p>13. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Famularo G, Gasbarrone L, De Virgilio A, Minisola G. Mirtazapine-associated hyponatremia in an elderly patient. Ann Pharmacother. juin 2009;43(6):1144-5.<\/p>\n<p>14. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Pledger DR, Mathew H. 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Neuropharmacological characterization of serotoninergic stimulation of vasopressin secretion in conscious rats. Neuroendocrinology. avr 1988;47(4):277-83.<\/p>\n<p>19. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Anderson IK, Martin GR, Ramage AG. Central administration of 5-HT activates 5-HT1A receptors to cause sympathoexcitation and 5-HT2\/5-HT1C receptors to release vasopressin in anaesthetized rats. Br J Pharmacol. d\u00e9c 1992;107(4):1020-8.<\/p>\n<p>20. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Marar IE, Amico JA. Vasopressin, oxytocin, corticotrophin-releasing factor, and sodium responses during fluoxetine administration in the rat. Endocrine. f\u00e9vr 1998;8(1):13-8.<\/p>\n<p>21. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Jacob S, Spinler SA. Hyponatremia associated with selective serotonin-reuptake inhibitors in older adults. Ann Pharmacother. sept 2006;40(9):1618-22.<\/p>\n<!-- templates\/buttons-placeholder.php -->\n<div class=\"da-reactions-outer TpostID2070\">\n\t    <div class=\"da-reactions-data da-reactions-container-async center\"\n         data-type=\"post\"\n         data-id=\"2070\"\n         id=\"da-reactions-slot-post-2070\">\n        <div class=\"da-reactions-exposed\">\n\t\t\t<img src=\"https:\/\/www.mimiryudo.com\/blog\/wp-content\/plugins\/da-reactions\/assets\/dist\/loading.svg\" alt=\"Loading spinner\" width=\"64\" height=\"64\" style=\"width:64px\" \/>\n        <\/div>\n    <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les IRS\u00a0sont effectivement associ\u00e9s \u00e0 un sur-risque d\u2019hyponatr\u00e9mie par rapport aux autres antid\u00e9presseurs (OR = 3,3, IC95% [1,3 \u2013 8,6]) (1). 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