Grande GE, Todd CJ. Why are trials in palliative care so difficult?Palliat Med2000; 14: 69–74.
2.
Apgar V. A proposal for a new method of evaluation of the newborn infant. Anesth Analg1953; 32: 260–267.
3.
Daly LE, Bourke GE. Interpretation and uses of medical statistics, fifth edition. Oxford: Blackwell, 2000.
4.
Carson MG, Fitch MI, Vachon MLS. Measuring patient outcome in palliative care: a reliability and validity study of the Support Team Assessment Schedule. Palliat Med2000; 14: 25–36.
5.
Last JM ed. A dictionary of epidemiology, third edition. Oxford: Oxford Univ. Press, 1995.
6.
Streiner DL, Norman GR. Health measurement scales: a practical guide to their development and use. Oxford: Oxford Univ. Press, 1995.
7.
Lo RSK, Woo J, Zhoc KCH, et al. Cross-cultural validation of the McGill quality of life questionnaire in Hong Kong Chinese. Palliat Med2001; 15: 387–397.
8.
Cronbach LJ. Coefficient alpha and the internal structure of tests. Psychometrika1951; 16: 297–334.
9.
Dunn G. Design and analysis of reliability studies. The statistical evaluation of measurement errors. New York: Oxford Univ. Press, 1989.
10.
Kuder GF, Richardson MW. The theory of the estimation of test reliability. Psychometrika1937; 2: 151–160.
11.
Manly BFJ. Multivariate statistical methods a primer. Chapman and Hall, 1986.
12.
Fleiss JL. The design and analysis of clinical experiments. New York: Wiley, 1986.
13.
Kaasa T, Wessel J, Darrah J, Bruera E. Inter-rater reliability of formally trained and self-trained raters using the Edmonton Functional Assessment Tool. Palliat Med2000; 14: 509–517.
14.
Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical agreement. Lancet1986; i: 307–310.
15.
Ward HW, Ramsdell JW, Jackson JE, Renvall M, Swart JA, Rockwell E. Cognitive function in comprehensive geriatric assessment. A comparison of cognitive test performance in residential and clinic settings. J Am Geriatr Soc1990; 38: 1088–1092.
16.
Cohen J. A coefficient of agreement for nominal scales. Educ Psychol Meas1960; 20: 37–46.
17.
Fleiss JL. Statistical methods for rates and proportions, second edition. New York: Wiley, 1981.
18.
McWhinney IR, Bass MJ, Donner A. Evaluation of a palliative care service: problems and pitfalls. Br Med J1994; 309: 1340–1342.
19.
Rees E, Hardy J, Ling J, Broadley K, A’Hern R. The use of the Edmonton Symptom Assessment Scale (ESAS) within a palliative care unit in the UK. Palliat Med1998; 12: 75– 82.
20.
Barnett M. Interviewing terminally ill people: is it fair to take their time?Palliat Med2001; 15: 157–158.