This data was simulated to mimic data from a longitudinal cohort study following mothers and their child from birth until approximately 4 years of age. It contains 2400 observations of 200 mother-child pairs. Children's BMI and head circumference was measured repeatedly and their age in months was recorded at each measurement. Furthermore, the data contain several baseline variables with information on the mothers' demographics and socioeconomic status.

simLong

simWide

Format

simLong: A data frame in long format with 2400 rows and 16 variables

simWide: A data frame in wide format with 200 rows and 81 variables

Baseline covariates

(in simLong and simWide)

GESTBIR

gestational age at birth (in weeks)

ETHN

ethnicity (binary: European vs. other)

AGE_M

age of the mother at intake

HEIGHT_M

height of the mother (in cm)

PARITY

number of times the mother has given birth (binary: 0 vs. >=1)

SMOKE

smoking status of the mother during pregnancy (3 ordered categories: never smoked during pregnancy, smoked until pregnancy was known, continued smoking in pregnancy)

EDUC

educational level of the mother (3 ordered categories: low, mid, high)

MARITAL

marital status (3 categories)

ID

subject identifier

Long-format variables

(only in simLong)

time

measurement occasion/visit (by design, children should be measured at/around 1, 2, 3, 4, 7, 11, 15, 20, 26, 32, 40 and 50 months of age)

age

child age at measurement time in months

bmi

child BMI

hc

child head circumference in cm

hgt

child height in cm

wgt

child weight in gram

sleep

sleeping behavior of the child (3 ordered categories)

Wide-format variables

(only in simWide)

age1, age2, age3, age4, age7, age11, age15, age20, age26, age32, age40, age50

child age at the repeated measurements in months

bmi1, bmi2, bmi3, bmi4, bmi7, bmi11, bmi15, bmi20, bmi26, bmi32, bmi40, bmi50

repeated measurements of child BMI

hc1, hc2, hc3, hc4, hc7, hc11, hc15, hc20, hc26, hc32, hc40, hc50

repeated measurements of child head circumference in cm

hgt1, hgt2, hgt3, hgt4, hgt7, hgt11, hgt15, hgt20, hgt26, hgt32, hgt40, hgt50

repeated measurements of child height in cm

wgt1, wgt2, wgt3, wgt4, wgt7, wgt11, wgt15, wgt20, wgt26, wgt32, wgt40, wgt50

repeated measurements of child weight in gram

sleep1, sleep2, sleep3, sleep4, sleep7, sleep11, sleep15, sleep20, sleep26, sleep32, sleep40, sleep50

repeated measurements of child sleep behavior (3 ordered categories)

Examples

summary(simLong)
#> GESTBIR ETHN AGE_M HEIGHT_M PARITY #> Min. :37.21 European:1620 Min. :16.40 Min. :151.7 0 :1440 #> 1st Qu.:39.30 other : 708 1st Qu.:26.91 1st Qu.:163.6 >= 1: 888 #> Median :40.17 NA's : 72 Median :30.26 Median :169.1 NA's: 72 #> Mean :40.23 Mean :30.34 Mean :168.8 #> 3rd Qu.:41.04 3rd Qu.:33.90 3rd Qu.:173.9 #> Max. :44.49 Max. :47.07 Max. :185.2 #> NA's :48 #> SMOKE EDUC MARITAL #> never smoked during pregnancy :1620 high:1104 married :1212 #> smoked until pregnancy was known: 132 mid : 876 living together: 768 #> continued smoking in pregnancy : 372 low : 228 no partner : 228 #> NA's : 276 NA's: 192 NA's : 192 #> #> #> #> time age bmi hc #> Min. : 1.00 Min. : 0.5086 Min. :10.81 Min. :31.83 #> 1st Qu.: 3.75 1st Qu.: 3.9900 1st Qu.:15.85 1st Qu.:41.63 #> Median :13.00 Median :12.8095 Median :16.64 Median :45.59 #> Mean :17.58 Mean :16.7850 Mean :16.55 Mean :45.33 #> 3rd Qu.:27.50 3rd Qu.:28.4537 3rd Qu.:17.37 3rd Qu.:49.07 #> Max. :50.00 Max. :48.8542 Max. :19.65 Max. :56.43 #> NA's :519 NA's :567 #> hgt wgt sleep ID #> Min. : 48.83 Min. : 2353 no problem:717 Length:2400 #> 1st Qu.: 64.97 1st Qu.: 6701 sometimes :915 Class :character #> Median : 78.80 Median : 9902 difficult :176 Mode :character #> Mean : 78.96 Mean :10295 NA's :592 #> 3rd Qu.: 91.58 3rd Qu.:13460 #> Max. :116.83 Max. :23855 #> NA's :479 NA's :210
summary(simWide)
#> GESTBIR ETHN AGE_M HEIGHT_M PARITY #> Min. :37.21 European:135 Min. :16.40 Min. :151.7 0 :120 #> 1st Qu.:39.30 other : 59 1st Qu.:26.91 1st Qu.:163.6 >= 1: 74 #> Median :40.17 NA's : 6 Median :30.26 Median :169.1 NA's: 6 #> Mean :40.23 Mean :30.34 Mean :168.8 #> 3rd Qu.:41.04 3rd Qu.:33.90 3rd Qu.:173.9 #> Max. :44.49 Max. :47.07 Max. :185.2 #> NA's :4 #> SMOKE EDUC MARITAL #> never smoked during pregnancy :135 high:92 married :101 #> smoked until pregnancy was known: 11 mid :73 living together: 64 #> continued smoking in pregnancy : 31 low :19 no partner : 19 #> NA's : 23 NA's:16 NA's : 16 #> #> #> #> ID age1 bmi1 hc1 #> Length:200 Min. :0.5086 Min. :11.81 Min. :31.83 #> Class :character 1st Qu.:0.9767 1st Qu.:14.30 1st Qu.:36.43 #> Mode :character Median :1.1596 Median :15.18 Median :37.28 #> Mean :1.1341 Mean :15.30 Mean :37.30 #> 3rd Qu.:1.2787 3rd Qu.:16.32 3rd Qu.:38.29 #> Max. :1.8476 Max. :19.22 Max. :40.87 #> NA's :26 #> hgt1 wgt1 sleep1 age2 bmi2 #> Min. :48.83 Min. :2353 no problem:28 Min. :2.004 Min. :12.43 #> 1st Qu.:53.32 1st Qu.:4092 sometimes :89 1st Qu.:2.209 1st Qu.:15.20 #> Median :55.01 Median :4680 difficult :32 Median :2.363 Median :16.13 #> Mean :54.97 Mean :4680 NA's :51 Mean :2.387 Mean :16.11 #> 3rd Qu.:56.66 3rd Qu.:5263 3rd Qu.:2.511 3rd Qu.:16.96 #> Max. :60.69 Max. :6432 Max. :2.984 Max. :20.00 #> NA's :56 NA's :12 #> hc2 hgt2 wgt2 sleep2 age3 #> Min. :36.97 Min. :53.48 Min. :3738 no problem:45 Min. :3.002 #> 1st Qu.:39.25 1st Qu.:57.52 1st Qu.:5248 sometimes :89 1st Qu.:3.251 #> Median :40.28 Median :59.25 Median :5683 difficult :22 Median :3.385 #> Mean :40.22 Mean :59.24 Mean :5763 NA's :44 Mean :3.419 #> 3rd Qu.:41.03 3rd Qu.:60.83 3rd Qu.:6342 3rd Qu.:3.583 #> Max. :43.85 Max. :65.46 Max. :7561 Max. :3.951 #> NA's :43 NA's :87 NA's :29 #> bmi3 hc3 hgt3 wgt3 sleep3 #> Min. :13.14 Min. :38.34 Min. :56.61 Min. :4338 no problem:42 #> 1st Qu.:15.77 1st Qu.:40.71 1st Qu.:60.48 1st Qu.:5978 sometimes :85 #> Median :16.79 Median :41.48 Median :61.83 Median :6429 difficult :21 #> Mean :16.82 Mean :41.63 Mean :62.07 Mean :6487 NA's :52 #> 3rd Qu.:17.78 3rd Qu.:42.55 3rd Qu.:63.82 3rd Qu.:6975 #> Max. :20.83 Max. :45.72 Max. :68.26 Max. :8785 #> NA's :28 NA's :63 NA's :17 #> age4 bmi4 hc4 hgt4 wgt4 #> Min. :4.003 Min. :13.56 Min. :39.21 Min. :58.22 Min. :4909 #> 1st Qu.:4.251 1st Qu.:16.26 1st Qu.:41.51 1st Qu.:62.38 1st Qu.:6435 #> Median :4.390 Median :17.10 Median :42.34 Median :64.07 Median :6917 #> Mean :4.427 Mean :17.08 Mean :42.48 Mean :64.24 Mean :6948 #> 3rd Qu.:4.589 3rd Qu.:18.01 3rd Qu.:43.51 3rd Qu.:66.20 3rd Qu.:7520 #> Max. :4.993 Max. :20.88 Max. :46.25 Max. :70.75 Max. :9227 #> NA's :45 NA's :87 NA's :28 #> sleep4 age7 bmi7 hc7 #> no problem: 37 Min. :5.038 Min. :13.48 Min. :40.52 #> sometimes :100 1st Qu.:5.772 1st Qu.:16.32 1st Qu.:42.84 #> difficult : 28 Median :6.278 Median :17.40 Median :43.93 #> NA's : 35 Mean :6.260 Mean :17.33 Mean :43.89 #> 3rd Qu.:6.724 3rd Qu.:18.20 3rd Qu.:45.03 #> Max. :8.005 Max. :20.63 Max. :47.66 #> NA's :30 #> hgt7 wgt7 sleep7 age11 #> Min. :61.38 Min. : 5446 no problem:24 Min. :10.11 #> 1st Qu.:65.70 1st Qu.: 7165 sometimes :93 1st Qu.:10.74 #> Median :67.51 Median : 7851 difficult :26 Median :11.17 #> Mean :67.58 Mean : 7831 NA's :57 Mean :11.18 #> 3rd Qu.:69.53 3rd Qu.: 8513 3rd Qu.:11.57 #> Max. :74.28 Max. :10786 Max. :12.44 #> NA's :36 NA's :16 #> bmi11 hc11 hgt11 wgt11 #> Min. :12.49 Min. :42.61 Min. :68.36 Min. : 7018 #> 1st Qu.:16.47 1st Qu.:44.78 1st Qu.:72.13 1st Qu.: 8760 #> Median :17.49 Median :45.71 Median :74.13 Median : 9577 #> Mean :17.38 Mean :45.95 Mean :74.43 Mean : 9574 #> 3rd Qu.:18.31 3rd Qu.:47.22 3rd Qu.:76.66 3rd Qu.:10326 #> Max. :21.11 Max. :50.62 Max. :82.79 Max. :12566 #> NA's :28 NA's :17 NA's :13 #> sleep11 age15 bmi15 hc15 #> no problem: 37 Min. :13.18 Min. :13.76 Min. :42.94 #> sometimes :100 1st Qu.:14.06 1st Qu.:16.38 1st Qu.:45.44 #> difficult : 11 Median :14.47 Median :17.14 Median :46.61 #> NA's : 52 Mean :14.48 Mean :17.20 Mean :46.56 #> 3rd Qu.:14.87 3rd Qu.:18.09 3rd Qu.:47.51 #> Max. :16.56 Max. :20.50 Max. :50.29 #> NA's :112 #> hgt15 wgt15 sleep15 age20 #> Min. :70.42 Min. : 6755 no problem:54 Min. :17.02 #> 1st Qu.:76.41 1st Qu.: 9642 sometimes :82 1st Qu.:18.15 #> Median :78.41 Median :10563 difficult :12 Median :18.75 #> Mean :78.31 Mean :10491 NA's :52 Mean :18.78 #> 3rd Qu.:80.13 3rd Qu.:11332 3rd Qu.:19.35 #> Max. :85.96 Max. :13591 Max. :22.25 #> NA's :13 NA's :14 #> bmi20 hc20 hgt20 wgt20 #> Min. :13.45 Min. :43.79 Min. :74.56 Min. : 7908 #> 1st Qu.:16.12 1st Qu.:46.59 1st Qu.:80.70 1st Qu.:10716 #> Median :17.05 Median :47.88 Median :83.03 Median :11637 #> Mean :16.96 Mean :47.92 Mean :82.80 Mean :11590 #> 3rd Qu.:17.79 3rd Qu.:49.07 3rd Qu.:84.67 3rd Qu.:12452 #> Max. :20.27 Max. :51.92 Max. :91.05 Max. :15449 #> NA's :30 NA's :17 NA's :17 #> sleep20 age26 bmi26 hc26 #> no problem:69 Min. :23.05 Min. :11.98 Min. :46.24 #> sometimes :81 1st Qu.:24.40 1st Qu.:15.59 1st Qu.:47.69 #> difficult : 8 Median :25.07 Median :16.33 Median :48.94 #> NA's :42 Mean :25.06 Mean :16.37 Mean :49.15 #> 3rd Qu.:25.75 3rd Qu.:17.17 3rd Qu.:50.32 #> Max. :28.27 Max. :19.59 Max. :52.76 #> NA's :135 #> hgt26 wgt26 sleep26 age32 #> Min. :80.58 Min. : 8775 no problem:85 Min. :29.00 #> 1st Qu.:86.21 1st Qu.:12217 sometimes :65 1st Qu.:30.01 #> Median :88.78 Median :13093 difficult : 7 Median :30.76 #> Mean :88.69 Mean :13149 NA's :43 Mean :30.78 #> 3rd Qu.:90.98 3rd Qu.:14121 3rd Qu.:31.37 #> Max. :98.10 Max. :18037 Max. :34.03 #> NA's :20 NA's :15 #> bmi32 hc32 hgt32 wgt32 #> Min. :11.35 Min. :45.33 Min. : 82.27 Min. : 9021 #> 1st Qu.:15.32 1st Qu.:48.42 1st Qu.: 90.58 1st Qu.:13154 #> Median :16.24 Median :49.81 Median : 93.15 Median :14328 #> Mean :16.28 Mean :49.77 Mean : 93.17 Mean :14278 #> 3rd Qu.:17.27 3rd Qu.:51.00 3rd Qu.: 95.64 3rd Qu.:15513 #> Max. :19.80 Max. :53.70 Max. :102.17 Max. :19133 #> NA's :30 NA's :34 NA's :20 #> sleep32 age40 bmi40 hc40 #> no problem:92 Min. :35.06 Min. :10.33 Min. :45.87 #> sometimes :52 1st Qu.:36.42 1st Qu.:14.98 1st Qu.:48.91 #> difficult : 5 Median :37.31 Median :15.93 Median :50.17 #> NA's :51 Mean :37.31 Mean :15.93 Mean :50.31 #> 3rd Qu.:38.15 3rd Qu.:16.86 3rd Qu.:51.51 #> Max. :40.78 Max. :19.45 Max. :55.09 #> NA's :30 #> hgt40 wgt40 sleep40 age50 #> Min. : 87.61 Min. :10138 no problem:100 Min. :44.13 #> 1st Qu.: 95.03 1st Qu.:14169 sometimes : 45 1st Qu.:45.54 #> Median : 98.04 Median :15378 difficult : 3 Median :46.18 #> Mean : 97.71 Mean :15355 NA's : 52 Mean :46.21 #> 3rd Qu.:100.03 3rd Qu.:16697 3rd Qu.:46.89 #> Max. :106.70 Max. :20508 Max. :48.85 #> NA's :24 NA's :13 #> bmi50 hc50 hgt50 wgt50 #> Min. : 9.716 Min. :47.49 Min. : 93.78 Min. :11540 #> 1st Qu.:14.827 1st Qu.:50.05 1st Qu.:101.05 1st Qu.:15490 #> Median :15.835 Median :51.21 Median :103.97 Median :16974 #> Mean :15.848 Mean :51.31 Mean :103.87 Mean :16966 #> 3rd Qu.:16.914 3rd Qu.:52.48 3rd Qu.:106.84 3rd Qu.:18284 #> Max. :20.205 Max. :56.43 Max. :116.83 Max. :23855 #> NA's :30 NA's :25 NA's :16 #> sleep50 #> no problem:104 #> sometimes : 34 #> difficult : 1 #> NA's : 61 #> #> #>