References
- Lanza F L. Endoscopic studies of gastric and duodenal injury after the use of ibuprofen, aspirin, and other non-steroid antiinflammatory agents. Am J Med 1984; 77: 19–24
- Chernish S M, Rosenak B D, Brunelle R L, Crabtree R. Comparison of gastrointestinal effects of aspirin and fenoprofen. Arthritis Rheum 1979; 22: 376–383
- Hoftiezer J W, Silvoso G R, Burks M, Ivey K J. Comparison of the effects of regular and enteric-coated aspirin on gastroduodenal mucosa of man. Lancet 1980; 2: 609–612
- Stiel D, Ellard K T, Hills L J, Brooks P M. Protective effect of enprostil against aspirin-induced gastroduodenal mucosal injury in man. Comparison with cimetidine and sucralfate. Am J Med 1986; 81: 54–58
- Osnes M, Larsen L, Eidsaunet W, Thorn E. Effect of diclofenac and naproxen on gastroduodenal mucosa. Clin Pharmacol Ther 1979; 26: 399–405
- Joice C RD, Zutshi D W, Hrubes V, Mason R M. Comparison of fixed interval and visual analogue scales for rating chronic pain. Eur J Clin Pharmacol 1975; 8: 415–420
- Huskisson E C. Measurement of pain. Lancet 1974; 2: 1127–1131
- Seymour R A. The use of pain scales in assessing the efficacy of analgesics in post-operative dental pain. Eur J Clin Pharmacol 1982; 23: 441–444
- Hedenbro J L, Wetterberg P, Vallgren S, Bergquist L. Lack of correlation between faecal blood loss and drug-induced gastric mucosal lesions. Gastrointest Endosc 1988; 34: 247–251
- Carlsson A M. Assessment of chronic pain. I. Aspects of the reliability and validity of the visual analogue scale. Pain 1983; 16: 87–101
- Kremer E, Atkinson J H, Ignelzi R J. Measurement of pain. Patient preference does not confound pain measurement. Pain 1981; 10: 241–249
- Nyren O, Adami H O, Bates S. Self-rating of pain in nonulcer dyspepsia. J Clin Gastroenterol 1987; 9: 408–414
- Jensen M P, Karoly P, Braver S. The measurement of clinical pain intensity: a comparison of six methods. Pain 1986; 27: 117–126
- Lehmann E L. Nonparametrics: statistical methods based on ranks. Holden-Day Inc., San Francisco 1975
- Kendall M. Rank correlation methods. Charles Griffin & Co. Ltd, London 1975
- Sandvik L, Olsson B. A nearly distribution-free test for comparing dispersion in paired samples. Biometrika 1982; 69: 484–485
- Aitken R CB, Zealley A K. Measurement of moods. Br J Hosp Med 1970; 4: 215–224
- Larsen S, Osnes M, Eidsaunet W, Sandvik L. Factors influencing the sample size, exemplified by studies on gastroduodenal tolerability of drugs. Scand J Gastroenterol 1985; 20: 395–400
- Revill S I, Robinson J O, Rosen M, Hogg MI J. The reliability of a linear analogue for evaluating pain. Anaesthesia 1976; 31: 1191–1198
- Ohnhaus E E, Adler R. Methodological problems in the measurement of pain: A comparison between the verbal rating scale and the visual analogue scale. Pain 1975; 1: 379–384