Extra outcome variables in the NLSY79

Source: R/extra-outcomes-79-doc.R

This dataset is provided primarily to facilitate documentation examples.

Format

A data frame with 11,495 observations on the following 6 variables. There is one row per subject.

  • SubjectTag The ID value assigned by NLS to the first subject. For Gen1 Subjects, this is their "CaseID" (ie, R00001.00). For Gen2 subjects, this is their "CID" (ie, C00001.00).

  • SubjectID The ID value assigned by NLS to the first subject. For Gen1 Subjects, this is their "CaseID" (ie, R00001.00). For Gen2 subjects, this is their "CID" (ie, C00001.00).

  • Generation The generation of the subject. Values are either 1 or 2, representing Gen1 and Gen2. Note that this variable is not a factor (in contrast with data frames like Links79Pair). This dataset is supposed to mimic the dataset provided by the researcher, which typically will not have been converted to a factor.

  • HeightZGenderAge The subject's height, standardized by gender and age (see Details).

  • WeightZGenderAge The subject's weight, standardized by gender and age (see Details).

  • AfqtRescaled2006Gaussified Armed Forces Qualification Test Score (Gen1 only; see Details).

  • Afi Self-reported age of first intercourse (Gen1 only; see Details).

  • Afm Self-reported age of first menstruation (Gen1 only; see Details).

  • MathStandardized Standardized PIAT Math scores (Gen2 only; see Details).

Source

Gen1 information comes from the Summer 2013 release of the NLSY79 sample. Gen2 information comes from the Summer 2013 release of the NLSY79 Children and Young Adults sample. Data were extracted with the NLS Investigator (https://www.nlsinfo.org/investigator/).

Details

The SubjectTag variable uniquely identify subjects. For Gen2 subjects, the SubjectTag is identical to their CID (ie, C00001.00 -the SubjectID assigned in the NLSY79-Children files). However for Gen1 subjects, the SubjectTag is their CaseID (ie, R00001.00), with "00" appended. This manipulation is necessary to identify subjects uniquely in inter-generational datasets. A Gen1 subject with an ID of 43 has a SubjectTag of 4300. The SubjectTags of her four children remain 4301, 4302, 4303, and 4304.

For Gen2, an NLSY79 variable of MathStandardized is C05801.00.

Afi and Afm, values were simplified (to one value per subject) by Kelly Williams in Sept 2010.

The variables for height and weight were manipulated in R files available in a repository available to the public. Find the appropriate subfolder, and view the HTML report for more details.

Download CSV If you're using the NlsyLinks package in R, the dataset is automatically available. However to use the kinship information in a different environment, download the csv, which is readable by all statistical software. links-metadata-2017-79.yml documents the dataset version information.

Author

Will Beasley

Examples

library(NlsyLinks) #Load the package into the current R session.
gen2Outcomes <- subset(ExtraOutcomes79, Generation==2) #Create a dataset of only Gen2 subjects.

#plot(ExtraOutcomes79) #Uncomment to see a large scatterplot matrix.
summary(ExtraOutcomes79)

#>    SubjectTag        SubjectID         Generation    HeightZGenderAge
#>  Min.   :    100   Min.   :      1   Min.   :1.000   Min.   :-2.985  
#>  1st Qu.: 314025   1st Qu.:   5998   1st Qu.:1.000   1st Qu.:-0.724  
#>  Median : 620050   Median :  12000   Median :1.000   Median :-0.045  
#>  Mean   : 618600   Mean   : 289254   Mean   :1.476   Mean   :-0.006  
#>  3rd Qu.: 914501   3rd Qu.: 577403   3rd Qu.:2.000   3rd Qu.: 0.648  
#>  Max.   :1268600   Max.   :1267501   Max.   :2.000   Max.   : 2.996  
#>                                                      NA's   :4711    
#>  WeightZGenderAge AfqtRescaled2006Gaussified      Afi             Afm       
#>  Min.   :-2.985   Min.   :-2.895             Min.   : 2.00   Min.   : 0.00  
#>  1st Qu.:-0.677   1st Qu.:-0.692             1st Qu.:15.00   1st Qu.:12.00  
#>  Median :-0.149   Median :-0.024             Median :17.00   Median :13.00  
#>  Mean   : 0.001   Mean   :-0.011             Mean   :16.66   Mean   :12.78  
#>  3rd Qu.: 0.533   3rd Qu.: 0.660             3rd Qu.:18.00   3rd Qu.:14.00  
#>  Max.   : 4.945   Max.   : 2.994             Max.   :27.00   Max.   :19.00  
#>  NA's   :4719     NA's   :12510              NA's   :12740   NA's   :18165  
#>  MathStandardized
#>  Min.   : 65.0   
#>  1st Qu.: 92.5   
#>  Median :100.0   
#>  Mean   :100.1   
#>  3rd Qu.:108.5   
#>  Max.   :135.0   
#>  NA's   :15085   

oldPar <- par(mfrow=c(3,2))
hist(ExtraOutcomes79$Generation)
hist(ExtraOutcomes79$MathStandardized)
hist(ExtraOutcomes79$HeightZGenderAge)
hist(ExtraOutcomes79$WeightZGenderAge)
hist(ExtraOutcomes79$Afi)
hist(ExtraOutcomes79$Afm)

par(oldPar)