# load data
load(url("https://biostatistics.dk/teaching/eurocim/data/nlsdata.rda"))The National Longitudinal Survey of Youth 1997 (NLSY97) is a longitudinal study following youth born between 1980 and 1984 with interviews from 1997 to 2022 and a total of 20 rounds (R1 - R20). We consider a subset of the data with measurements in 1997, 2002 and 2008 (R1, R6 and R12), and the variables described in the table below. We consider a total of 6315 complete cases. For details see https://www.nlsinfo.org/content/cohorts/nlsy97.
| Variable name | Tier | Type | Description |
|---|---|---|---|
| r1_hhchildren | R1 | Numeric | Number of household members younger than 18 |
| r1_urban | R1 | Binary | Urban status (Urban / Non-urban) |
| r1_mcollege | R1 | Binary | Did biological mother attend college? (Yes / No) |
| r6_exercise | R6 | Numeric | Days with 30+ minutes exercise /week |
| r6_depressed | R6 | Binary | Having felt depressed during the last month (Sometimes / No) |
| r6_docvisits | R6 | Numeric | Number of doctor’s visits during the last year |
| r12_health | R12 | Binary | Perception of own health (Good / Poor) |
| r12_depressed | R12 | Binary | Having felt depressed during the last month (Sometimes / No) |
| r12_docvisits | R12 | Numeric | Number of doctor’s visits during the last year |
# load data
load(url("https://biostatistics.dk/teaching/eurocim/data/nlsdata2.rda"))This dataset is also a subset of the NLSY97 data with measurements in 1997, 2002 and 2008 (R1, R6 and R12), but consists of 23 variables described in the table below. This dataset contains of 8984 observations, but now with missing values.
| Variable name | Tier | Type | Description |
|---|---|---|---|
| r1_age | R1 | Numeric | Age at inclusion |
| r1_sex | R1 | Binary | Sex (Male / Female) |
| r1_hhsize | R1 | Numeric | Number of household members |
| r1_hhchildren | R1 | Numeric | Number of household members younger than 18 |
| r1_parents | R1 | Binary | Does the non-responding biological parent live in the household? (Yes / No) |
| r1_urban | R1 | Binary | Urban status (Urban / Non-urban) |
| r1_race | R1 | Binary | Race/ethnicity (Black/hispanic/mixed race / Non-black/non-hispanic) |
| r1_mcollege | R1 | Binary | Did biological mother attend college? (Yes / No) |
| r1_mage | R1 | Numeric | Age of biological mother at first birth |
| r1_veg | R1 | Numeric | Days eating vegetables /week |
| r1_exercise | R1 | Numeric | Days with 30+ minutes exercise /week |
| r1_health | R1 | Binary | Perception of own health (Good / Poor) |
| r1_depressed | R1 | Binary | Having felt depressed during the last month (Sometimes / No) |
| r6_veg | R6 | Numeric | Meals inclduing vegetables /week |
| r6_exercise | R6 | Numeric | Days with 30+ minutes exercise /week |
| r6_health | R6 | Binary | Perception of own health (Good / Poor) |
| r6_depressed | R6 | Binary | Having felt depressed during the last month (Sometimes / No) |
| r6_docvisits | R6 | Numeric | Number of doctor’s visits during the last year |
| r12_veg | R12 | Numeric | Meals including vegetables /week |
| r12_exercise | R12 | Numeric | Days with 30+ minutes exercise /week |
| r12_health | R12 | Binary | Perception of own health (Good / Poor) |
| r12_depressed | R12 | Binary | Having felt depressed during the last month (Sometimes / No) |
| r12_docvisits | R12 | Numeric | Number of doctor’s visits during the last year |