To the Editor.
—We are writing to alert the readers of JAMA to two errors we have discovered in our article, "The Association Between Prenatal Care and Birth Weight Among Women Exposed to Cocaine in New York City."1 The first is a transcriptional error that appears in Table 1 and the second is a coding error in one of the variables that will result in changes to Tables 1, 4, and 5 as well as Figs 1 and 2.The transcriptional error concerns the values of prenatal exposures to other drugs. As they appear in Table 1 in the published article, these values are 5% for blacks, 5% for whites, and 3% for Hispanics. These values should read 24% for blacks, 35% for whites, and 31% for Hispanics.The coding error occurred in programming the missing values for the variable prepregnancy weight. On the data tapes we received from
Racine AD, Joyce TJ, Anderson R. The Association Between Prenatal Care and Birth Weight Among Women Exposed to Cocaine in New York City: A Correction. JAMA. 1994;271(15):1161-1162. doi:10.1001/jama.1994.03510390031025