• 1
    Pincus T, Callahan LF. Rheumatology function tests: grip strength, walking time, button test and questionnaires document and predict long-term morbidity and mortality in rheumatoid arthritis. J Rheumatol 1992; 19: 10517.
  • 2
    Pincus T, Brooks RH, Callahan LF. Reliability of grip strength, walking time and button test performed according to a standard protocol. J Rheumatol 1991; 18: 9971000.
  • 3
    Fries JF, Ramey DR. “Arthritis specific” global health analog scales assess “generic” health related quality-of-life in patients with rheumatoid arthritis. J Rheumatol 1997; 24: 1697702.
  • 4
    Buchbinder R, Bombardier C, Yeung M, Tugwell P. Which outcome measures should be used in rheumatoid arthritis clinical trials? Clinical and quality-of-life measures' responsiveness to treatment in a randomized controlled trial. Arthritis Rheum 1995; 38: 156880.
  • 5
    Pincus T, Callahan LF, Sale WG, Brooks AL, Payne LE, Vaughn WK. Severe functional declines, work disability, and increased mortality in seventy-five rheumatoid arthritis patients studied over nine years. Arthritis Rheum 1984; 27: 86472.
  • 6
    Pincus T, Callahan LF, Vaughn WK. Questionnaire, walking time and button test measures of functional capacity as predictive markers for mortality in rheumatoid arthritis. J Rheumatol 1987; 14: 24051.
  • 7
    Pincus T, Brooks RH, Callahan LF. A proposed 30-45 minute 4 page standard protocol to evaluate rheumatoid arthritis (SPERA) that includes measures of inflammatory activity, joint damage, and long-term outcomes. J Rheumatol 1999; 26: 47380.
  • 8
    Mitchell JM, Burkhauser RV, Pincus T. The importance of age, education, and comorbidity in the substantial earnings losses of individuals with symmetric polyarthritis. Arthritis Rheum 1988; 31: 34857.
  • 9
    Lee P, Baxter A, Dick WC, Webb J. An assessment of grip strength measurement in rheumatoid arthritis. Scand J Rheumatol 1974; 3: 1723.
  • 10
    Stern EB, Ytterberg SR, Krug HE, Mullin GT, Mahowald ML. Immediate and short-term effects of three commercial wrist extensor orthoses on grip strength and function in patients with rheumatoid arthritis. Arthritis Care Res 1996; 9: 4250.
  • 11
    Nordenskiold U. Elastic wrist orthoses: reduction of pain and increase in grip force for women with rheumatoid arthritis. Arthritis Care Res 1990; 3: 15862.
  • 12
    Cordery J, Rocchi M. Joint protection and fatigue management: rheumatologic rehabilitation series. Bethesda (MD): American Occupational Therapy Association; 1998. p. 279321.
  • 13
    Ng CL, Ho DD, Chow SP. The Moberg pickup test: results of testing with a standard protocol. J Hand Ther 1999; 12: 30912.
  • 14
    Arnett FC, Edworthy SM, Bloch DA, McShane DJ, Fries JF, Cooper NS, et al. The American Rheumatism Association 1987 revised criteria for the classification of rheumatoid arthritis. Arthritis Rheum 1988; 31: 31524.
  • 15
    Scott DL, Houssien DA. Joint assessment in rheumatoid arthritis. Br J Rheumatol 1996; 35 Suppl 2: 14–8.
  • 16
    Jones E, Hanly JG, Mooney R, Rand LL, Spurway PM, Eastwood BJ, et al. Strength and function in the normal and rheumatoid hand. J Rheumatol 1991; 18: 13138.
  • 17
    Scott DL, Houssien DA. Clinical and laboratory assessments in rheumatoid arthritis and osteoarthritis. Br J Rheumatol 1996; 35Suppl 3: 6–9.
  • 18
    Fries JF, Spitz P, Kraines RG, Holman HR. Measurement of patient outcome in arthritis. Arthritis Rheum 1980; 23: 13745.
  • 19
    Bruhlmann P, Stucki G, Michel BA. Evaluation of a German version of the physical dimensions of the Health Assessment Questionnaire in patients with rheumatoid arthritis. J Rheumatol 1994; 21: 12459.
  • 20
    Felson DT, Anderson JJ, Boers M, Bombardier C, Furst D, Goldsmith C, et al. American College of Rheumatology preliminary definition of improvement in rheumatoid arthritis. Arthritis Rheum 1995; 38: 72735.
  • 21
    Ihaka R, Gentleman RR. Language of data analysis and graphics. J Computation Graphic Stat 1996; 5: 299314.
  • 22
    Selvin S. Modern applied biostatistical methods using S-Plus. New York: Oxford University Press; 1998.
  • 23
    Rosner B. Fundamentals of biostatistics, 4th edition Belmont (CA): Duxbury Press; 1995.
  • 24
    Jebsen RH, Taylor N, Trieschmann RB, Trotter MJ, Howard LA. An objective and standardized test of hand function. Arch Phys Med Rehabil 1969; 50: 3119.