Table 1 Results of adjusted multivariate regression to determine independent effect of variables on SIR* estimates for cancer in SLE

Female sex

1.00

0.77 to 1.30

Race/ethnicity

  White

Reference group

  Black

0.75

0.58 to 0.97

  Asian

1.18

0.85 to 1.62

Age

  <40

Reference group

  40 to 59

0.72

0.55 to 0.94

  60+

0.55

0.42 to 0.73

SLE duration

  <5 years

Reference group

  ≥5 years

0.74

0.61 to 0.89

Calendar-year period

  <2000

Reference group

  ≥2000

0.95

0.79 to 1.15