Table 4. Covariates included in analyses in the two datasets

CovariatesNICHD- SECCYDECLS-K
SamplingInclude SiteUse kindergarten weights
Race/ethnicityRace/EthnicityRace/Ethnicity
Gender (female=1)Female (0/1 variable)Female (0/1 variable)
Maternal EducationMaternal EducationMaternal Education
Low-income statusMean of Income/needs 6m-54m < 2Income/needs Fall of kindergarten < 2
Marital StatusProportion time mother married 1-54 monthsWhether mother is married at Fall of kindergarten
Child ageAge on Sept 1 of kindergartenAge on Sept 1 of kindergarten
Disability statusMother report of disabilityMother report or doctor diagnosis of disability
Home LanguageN/AWhether home language is English