Table 1

Prediagnostic serum concentrations of α tocopherol, β carotene and retinol, among selected cases of rheumatoid arthritis and systemic lupus erythematosus and their race-sex-age matched controls, Washington County, Maryland

Cases Controls Difference1-150 95% confidence limits % difference1-151
Rheumatoid arthritis:
Number2184
Mean (SD)Mean (SD)
α tocopherol (mg/dl)1.07 (0.23)1.13 (0.28)−0.05−0.20, 0.10−4.7
β carotene (μg/dl)16.6 (9.2)23.4 (9.6)−6.9−13.1, −0.6−29.3
Retinol (μg/dl)56.2 (14.1)60.5 (11.3)−4.3−10.0, 1.4−7.1
Systemic lupus erythematosus:
Number624
Mean (SD)Mean (SD)
α tocopherol (mg/dl)0.64 (0.09)0.80 (0.21)−0.17−0.41, 0.08−20.6
β carotene (μg/dl)17.2 (9.6)19.8 (5.5)−2.6−10.2, 5.04−13.1
Retinol (μg/dl)43.7 (12.6)51.2 (3.8)−7.5−19.1, 4.1−14.6
  • 1-150  Calculations based on values carried to three decimal places.

  • 1-151 Embedded Image