Table 8.

Socioeconmic Status as an Intervening Variable by Study Group

FTHPTSPTNPTSGA
SESDischarge37 ± 1436 ± 1640 ± 1436 ± 1545 ± 15
SES*4 y38a ± 1429b ± 1840a ± 1638a ± 1543a ± 16
SES8 y40 ± 1334 ± 1441 ± 1436 ± 1443 ± 12
  • Plus and minus values are means ± SD. Letters in the body of the table indicate significant differences among the study groups, FT, SPT, NPT, SGA > HPT, at P = .005 (SES age 4).