Racial disparity in hypertensive disorders of pregnancy in New York State: a 10-year longitudinal population-based study.

Objectives: We studied trends of hypertensive disorders of pregnancy by residential socioeconomic status (SES) and racial/ethnic subgroups in New York State over a 10-year period.

Methods: We merged New York State discharge data for 2.5 million women hospitalized with delivery from 1993 through 2002 with 2000 US Census data.