References
1. Quartana PJ, Campbell CM, Edwards RR. Pain catastrophizing: a critical review. Expert Rev Neurother 2009;9:745-758.
2. Edwards RR, Bingham CO 3rd Bathon J, et al. Catastrophizing and pain in arthritis, fibromyalgia, and other rheumatic diseases. Arthritis Care Res 2006;55:325-332.
3. Pinto PR, McIntyre T, Almeida A, et al. The mediating role of pain catastrophizing in the relationship between presurgical anxiety and acute postsurgical pain after hysterectomy. Pain 2012;153:218-226.
4. Weissman-Fogel I, Sprecher E, Pud D. Effects of catastrophizing on pain perception and pain modulation. Exp Brain Res 2008;186:79-85.
5. Sullivan MJL, Bishop SR, Pivik J. The Pain Catastrophizing Scale: development and validation. Psychol Assess 1995;7:524-532.
6. Börsbo B, Peolsson M, Gerdle B. Catastrophizing, depression, and pain: correlation with and influence on quality of life and health-a study of chronic whiplash-associated disorders. J Rehabil Med 2008;40:562-569.
7. Drahovzal DN, Stewart SH, Sullivan MJL. Tendency to catastrophize somatic sensations: pain catastrophizing and anxiety sensitivity in predicting headache. Cogn Behav Ther 2006;35:226-235.
8. Granot M, Ferber SG. The roles of pain catastrophizing and anxiety in the prediction of postoperative pain intensity: a prospective study. Clin J Pain 2005;21:439-445.
9. Craner JR, Gilliam WP, Sperry JA. Rumination, magnification, and helplessness: how do different aspects of pain catastrophizing relate to pain severity and functioning? Clin J Pain 2016;32:1028-1035.
10. Gilliam WP, Craner JR, Morrison EJ, et al. The mediating effects of the different dimensions of pain catastrophizing on outcomes in an interdisciplinary pain rehabilitation program. Clin J Pain 2017;33:443-451.
11. Meints SM, Stout M, Abplanalp S, et al. Pain-related rumination, but not magnification or helplessness, mediates race and sex differences in experimental pain. J Pain 2017;18:332-339.
12. Trevisani L, Zelante A, Sartori S. Colonoscopy, pain and fears: is it an indissoluble trinomial? World J Gastrointest Endosc 2014;6:227-233.
13. Jones MP, Ebert CC, Sloan T, et al. Patient anxiety and elective gastrointestinal endoscopy. J Clin Gastroenterol 2004;38:35-40.
14. Sewitch MJ, Gong S, Dube C, et al. A literature review of quality in lower gastrointestinal endoscopy from the patient perspective. Can J Gastroenterol 2011;25:681-685.
15. Khan RS, Ahmed K, Blakeway E, et al. Catastrophizing: a predictive factor for postoperative pain. Am J Surg 2011;201:122-131.
16. Grosen K, Drewes AM, Pilegaard HK, et al. Situational but not dispositional pain catastrophizing correlates with early postoperative pain in pain-free patients before surgery. J Pain 2016;17:549-560.
17. Papaioannou M, Skapinakis P, Damigos D, et al. The role of catastrophizing in the prediction of postoperative pain. Pain Med 2009;10:1452-1459.
18. Iani L, Lauriola M, Costantini M. A confirmatory bifactor analysis of the hospital anxiety and depression scale in an Italian community sample. Health Qual Life Outcomes 2014;12:1-8.
19. Warden V, Hurley AC, Volicer L. Development and psychometric evaluation of the Pain Assessment in Advanced Dementia (PAINAD) scale. J Am Med Dir Assoc 2003;4:9-15.
20. Dawson R, von Fintel N, Nairn S. Sedation assessment using the Ramsay scale. Emerg Nurse 2010;18:18-20.
21. Monticone M, Baiardi P, Ferrari S, et al. Development of the Italian version of the Pain Catastrophising Scale (PCS-I): cross-cultural adaptation, factor analysis, reliability, validity and sensitivity to change. Qual Life Res 2012;21:1045-1050.
22. Cohen J. Statistical Power Analysis for the Behavioral Sciences. Mahwah, NJ:Lawrence Erlbaum Associates;1988.
23. Hayes A. Introduction to Mediation, Moderation, and Conditional Process Analysis. New York:Guilford Press;2013.
24. Fritz MS, Mackinnon DP. Required sample size to detect the mediated effect. Psychol Sci 2007;18:233-239.
25. Stern AF. The Hospital Anxiety and Depression Scale. Occup Med (London) 2014;64:393-394.
26. Hazeldine S, Fritschi L, Forbes G. Predicting patient tolerance of endoscopy with conscious sedation. Scand J Gastroenterol 2010;45:1248-1254.
27. Bal BS, Crowell MD, Kohli DR, et al. What factors are associated with the difficult-to-sedate endoscopy patient? Dig Dis Sci 2012;57:2527-2534.
28. Essink-Bot M-L, Kruijshaar ME, Bac DJ, et al. Different perceptions of the burden of upper GI endoscopy: an empirical study in three patient groups. Qual Life Res 2007;16:1309-1318.
29. Behrouzian F, Sadrizadeh N, Nematpour S, et al. The effect of psychological preparation on the level of anxiety before upper gastrointestinal endoscopy. J Clin Diagn Res 2017;11:VC01-VC04.
30. Pontone S, Tonda M, Brighi M, et al. Does anxiety or waiting time influence patients' tolerance of upper endoscopy? Saudi J Gastroenterol 2015;21:111-115.
31. Woo AKM. Depression and anxiety in pain. Rev Pain 2010;4:8-12.
32. Tang J, Gibson SJ. A psychophysical evaluation of the relationship between trait anxiety, pain perception, and induced state anxiety. J Pain 2005;6:612-619.
33. Thibodeau MA, Welch PG, Katz J, et al. Pain-related anxiety influences pain perception differently in men and women: a quantitative sensory test across thermal pain modalities. Pain 2013;154:419-426.
34. Pérez-Edgar K, Fox NA. Temperament and anxiety disorders. Child Adolesc Psychiatr Clin N Am 2005;14:681-706.
35. Rothbart MK. Temperament, development, and personality. Curr Dir Psychol Sci 2007;16:207-212.
36. Edwards RR, Haythornthwaite JA, Sullivan MJ, et al. Catastrophizing as a mediator of sex differences in pain: differential effects for daily pain versus laboratory-induced pain. Pain 2004;111:335-341.
37. Fillingim RB, King CD, Ribeiro-Dasilva MC, et al. Sex, gender, and pain: a review of recent clinical and experimental findings. J Pain 2009;10:447-485.
38. Brown S, Bevan R, Rubin G, et al. Patient-derived measures of GI endoscopy: a meta-narrative review of the literature. Gastrointest Endosc 2015;81:1130-40.e1-e9.
39. Bruehl S, Chung OY. Psychological interventions for acute pain. In: Hadjistavropoulos T, Craig KD, eds. Pain: Psychological Perspectives. Mahwah, NJ: Lawrence Erlbaum Associates; 2003:245-270.
40. Maguire D, Walsh JC, Little CL. The effect of information and behavioural training on endoscopy patients’ clinical outcomes. Patient Educ Couns 2004;54:61-65.