Table 3

Crude and adjusted incidence rates of primary discoid lupus erythematosus (pDLE) among Manhattan residents, 2007–2009, overall and by sex and race/ethnicity

Crude rate (95% CI)Age-adjusted rate (95% CI)χ2 p valueCapture–recapture adjusted rate
Primary definition pDLE—any MD diagnosis
 Total0.9 (0.6 to 1.2)0.8 (0.6 to 1.1)1.3 (0.6 to 2.0)
  Male0.3 (0.1 to 0.7)0.3 (0.1 to 0.6)<0.0001
  Female1.4 (0.9 to 1.9)1.3 (0.9 to 1.8)
Race/ethnicity<0.0001*
  Non-Latino white0.3 (0.1 to 0.6)0.3 (0.1 to 0.6)0.4 (0.3 to 0.4)
  Non-Latino black2.4 (1.3 to 3.9)2.3 (1.3 to 3.8)4.0 (2.1 to 5.8)
  Latino1.0 (0.5 to 1.7)1.0 (0.5 to 1.7)1.5 (1.0 to 2.0)
  Non-Latino Asian0.6 (0.1 to 1.7)0.6 (0.1 to 1.7)1.1 (-0.5 to 2.7)
  
Secondary definition pDLE—rheumatologist or dermatologist diagnosis
 Total0.5 (0.4 to 0.8)0.5 (0.3 to 0.7)0.9 (0.2 to 1.5)
  Male0.1 (0.0 to 0.4)0.1 (0.0 to 0.3)0.0002
  Female0.9 (0.6 to 1.4)0.8 (0.5 to 1.3)
 Race/ethnicity<0.0001†
  Non-Latino white0.2 (0.1 to 0.5)0.2 (0.0 to 0.4)0.2 (0.1 to 0.3)
  Non-Latino black1.9 (1.0 to 3.3)1.8 (0.9 to 3.2)3.2 (1.8 to 4.6)
  Latino0.5 (0.2 to 1.1)0.5 (0.2 to 1.0)0.9 (-0.1 to 1.8)
  Non-Latino Asian0.6 (0.1 to 1.7)0.6 (0.1 to 1.7)0.9 (-0.5 to 2.3)
 

  • Cases exclude those meeting American College of Rheumatology criteria for SLE.

  • Rates are per 100 000 Manhattan residents. Denominator data are based on 2007–2009 intercensal population estimates from the New York City Department of Health and Mental Hygiene Bureau of Epi Services (2000–2014 files).

  • Data are age-adjusted to the US 2000 Standard Population.

  • Cases were assigned to one of five mutually exclusive race/ethnicity categories: non-Latino white, non-Latino black, non-Latino Asian, Latino and non-Latino other. Non-Latino cases identified with more than one race were categorised as non-Latino other; rates were not calculated for this group.

  • *Non-Latino blacks differed from non-Latino whites and non-Latino Asians. Latinos also differed from non-Latino whites and non-Latino Asians.

  • †Non-Latino blacks differed from non-Latino whites and Latinos.