LETTER TO THE EDITOR Racial variation in rheumatoid arthritis

1 Wright B D. Solving measurement problems with the Rasch model. Y Educ Res 1977; 14: 97-116. 2 Silverstein B, Fisher W P, Kilgore K M, Harley J P, Harvey R F. Applying psychometric criteria to functional assessment in medical rehabilitation: II. Defining interval measures. Arch Phys Med Rehabil 1992; 73: 507-18. 3 Merbitz C, Morris J, Grip J C. Ordinal scales and foundations of misinference. Arch Phys Med Rehabil 1989; 70: 308-12.

[1]  A. Prost,et al.  Epidemiology of adult Still's disease: estimate of the incidence by a retrospective study in west France. , 1995, Annals of the rheumatic diseases.

[2]  A. Silman,et al.  Low prevalence of rheumatoid arthritis in black-Caribbeans compared with whites in inner city Manchester. , 1994, Annals of the rheumatic diseases.

[3]  W. James.  Rheumatoid arthritis, the contraceptive pill, and androgens. , 1993, Annals of the rheumatic diseases.

[4]  W. James.  Causes of racial differences in testosterone levels of men. , 1993, Journal of the National Cancer Institute.

[5]  W. Fisher,et al.  Applying psychometric criteria to functional assessment in medical rehabilitation: II. Defining interval measures. , 1992, Archives of physical medicine and rehabilitation.

[6]  H. Nyborg,et al.  Racial/ethnic variations in male testosterone levels: A probable contributor to group differences in health , 1992, Steroids.

[7]  J C Grip,et al.  Ordinal scales and foundations of misinference. , 1989, Archives of physical medicine and rehabilitation.

[8]  B. Henderson,et al.  The early in utero oestrogen and testosterone environment of blacks and whites: potential effects on male offspring. , 1988, British Journal of Cancer.

[9]  L. Bernstein,et al.  Serum testosterone levels in healthy young black and white men. , 1986, Journal of the National Cancer Institute.

[10]  C. L. Cooke,et al.  Still's disease in a 70-year-old woman. , 1983, JAMA.

[11]  E. Wynder,et al.  Environmental factors, hormone status, and prostatic cancer. , 1980, Preventive medicine.