myopia {aplore3}

R Documentation

MYOPIA data

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)

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