myopia: MYOPIA data

In aplore3: Datasets from Hosmer, Lemeshow and Sturdivant, "Applied Logistic Regression" (3rd Ed., 2013)

Description

myopia dataset.

Usage

myopia

Format

A data.frame with 618 rows and 18 variables:

id

Subject identifier (1-1503)

studyyear

Year subject entered the study (Year)

myopic

Myopia within the first five years of follow up (1: No, 2: Yes)

age

Age at first visit (Years)

gender

Gender (1: Male, 2: Female)

spheq

Spherical Equivalent Refraction (diopter)

al

Axial Length (mm)

acd

Anterior Chamber Depth (mm)

lt

Lens Thickness (mm)

vcd

Vitreous Chamber Depth (mm)

sporthr

How many hours per week outside of school the child spent engaging in sports/outdoor activities (Hours per week)

readhr

How many hours per week outside of school the child spent reading for pleasure (Hours per week)

comphr

How many hours per week outside of school the child spent playing video/computer games or working on the computer (Hours per week)

studyhr

How many hours per week outside of school the child spent reading or studying for school assignments (Hours per week)

tvhr

How many hours per week outside of school the child spent watching television (Hours per week)

diopterhr

Composite of near-work activities (Hours per week)

mommy

Was the subject's mother myopic? (1: No, 2: Yes)

dadmy

Was the subject's father myopic? (1: No, 2: Yes)

Source

Hosmer, D.W., Lemeshow, S. and Sturdivant, R.X. (2013) Applied Logistic Regression, 3rd ed., New York: Wiley

Examples

head(myopia, n = 10)
summary(myopia)

Example output

   id studyyear myopic age gender  spheq    al   acd    lt   vcd sporthr readhr
1   1      1992    Yes   6 Female -0.052 21.89 3.690 3.498 14.70      45      8
2   2      1995     No   6 Female  0.608 22.38 3.702 3.392 15.29       4      0
3   3      1991     No   6 Female  1.179 22.49 3.462 3.514 15.52      14      0
4   4      1990    Yes   6 Female  0.525 22.20 3.862 3.612 14.73      18     11
5   5      1995     No   5   Male  0.697 23.29 3.676 3.454 16.16      14      0
6   6      1995     No   6   Male  1.744 22.14 3.224 3.556 15.36      10      6
7   7      1993     No   6 Female  0.683 22.33 3.186 3.654 15.49      12      7
8   8      1991     No   6 Female  1.272 22.39 3.732 3.584 15.08      12      0
9   9      1991     No   7   Male  1.396 22.62 3.464 3.408 15.74       4      0
10 10      1991     No   6 Female  0.972 22.74 3.504 3.696 15.54      30      5
   comphr studyhr tvhr diopterhr mommy dadmy
1       0       0   10        34   Yes   Yes
2       1       1    7        12   Yes   Yes
3       2       0   10        14    No    No
4       0       0    4        37    No   Yes
5       0       0    4         4   Yes    No
6       2       1   19        44    No   Yes
7       2       1    8        36    No   Yes
8       0       0    8         8    No    No
9       3       1    3        12    No    No
10      1       0   10        27    No    No
       id          studyyear    myopic         age           gender   
 Min.   :  1.0   Min.   :1990   No :537   Min.   :5.000   Male  :316  
 1st Qu.:155.2   1st Qu.:1991   Yes: 81   1st Qu.:6.000   Female:302  
 Median :309.5   Median :1992             Median :6.000               
 Mean   :309.5   Mean   :1992             Mean   :6.299               
 3rd Qu.:463.8   3rd Qu.:1994             3rd Qu.:6.000               
 Max.   :618.0   Max.   :1995             Max.   :9.000               
     spheq               al             acd              lt       
 Min.   :-0.6990   Min.   :19.90   Min.   :2.772   Min.   :2.960  
 1st Qu.: 0.4562   1st Qu.:22.04   1st Qu.:3.424   1st Qu.:3.436  
 Median : 0.7290   Median :22.46   Median :3.585   Median :3.542  
 Mean   : 0.8010   Mean   :22.50   Mean   :3.579   Mean   :3.541  
 3rd Qu.: 1.0340   3rd Qu.:22.97   3rd Qu.:3.730   3rd Qu.:3.640  
 Max.   : 4.3720   Max.   :24.56   Max.   :4.250   Max.   :4.112  
      vcd           sporthr          readhr           comphr      
 Min.   :13.38   Min.   : 0.00   Min.   : 0.000   Min.   : 0.000  
 1st Qu.:14.93   1st Qu.: 6.00   1st Qu.: 0.000   1st Qu.: 0.000  
 Median :15.36   Median :10.00   Median : 2.000   Median : 1.000  
 Mean   :15.38   Mean   :11.95   Mean   : 2.796   Mean   : 2.105  
 3rd Qu.:15.84   3rd Qu.:16.00   3rd Qu.: 4.000   3rd Qu.: 3.000  
 Max.   :17.30   Max.   :45.00   Max.   :20.000   Max.   :30.000  
    studyhr           tvhr          diopterhr      mommy     dadmy    
 Min.   : 0.00   Min.   : 0.000   Min.   :  2.00   No :305   No :310  
 1st Qu.: 0.00   1st Qu.: 4.250   1st Qu.: 15.00   Yes:313   Yes:308  
 Median : 1.00   Median : 8.000   Median : 23.00                      
 Mean   : 1.49   Mean   : 8.948   Mean   : 26.02                      
 3rd Qu.: 2.00   3rd Qu.:12.000   3rd Qu.: 34.00                      
 Max.   :15.00   Max.   :31.000   Max.   :101.00                      

aplore3 documentation built on May 2, 2019, 8:24 a.m.