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Table 4 Impact of onset age of visual impairment on log monthly wagesa,b

From: Effect of the age of visual impairment onset on employment outcomes in South Korea: analysis of the national survey on persons with disabilities data

  

Prime-aged adults, 20–49

Late-middle-aged adults, 50–64

  

All employees

Permanent employees

Temporary employees

All employees

Permanent employees

Temporary employees

  

Model 2.1

Model 2.2

Model 2.1

Model 2.2

Model 2.1

Model 2.2

Model 2.1

Model 2.2

Model 2.1

Model 2.2

Model 2.1

Model 2.2

  

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Coef. (SE)

Onset age of visual impairment

 (ref. = Age 0–5)

Age 6–17

-0.040

(0.113)

-0.038

(0.139)

0.086

(0.105)

0.084

(0.149)

-0.003 (0.242)

0.138 (0.301)

0.074

(0.269)

-0.335 (0.513)

-0.692* (0.376)

-0.902** (0.309)

0.419* (0.211)

1.062** (0.484)

Age 18–24

0.014

(0.145)

0.068

(0.149)

0.106

(0.136)

0.224

(0.151)

0.303 (0.376)

0.255 (0.401)

0.382 (0.305)

0.197 (0.555)

-0.127 (0.452)

-0.070 (0.398)

0.358* (0.212)

1.165** (0.459)

Age 25 + 

0.102

(0.136)

0.134

(0.156)

0.353**

(0.126)

0.435**

(0.158)

0.128 (0.244)

0.266 (0.268)

0.118 (0.259)

-0.227 (0.506)

-0.641* (0.344)

-0.890** (0.274)

0.448** (0.202)

1.122** (0.427)

 Sex

Women

-0.530**

(0.118)

-0.450*

(0.230)

-0.660**

(0.108)

-0.424**

(0.183)

-0.339* (0.193)

-0.261 (0.362)

-0.381** (0.110)

-0.943* (0.522)

-0.313* (0.176)

-1.255** (0.392)

-0.386** (0.130)

0.355 (0.447)

Interaction terms

 

Age 6–17*Women

 

-0.026

(0.288)

 

-0.069

(0.245)

 

-0.177 (0.465)

 

0.855 (0.530)

 

1.209** (0.415)

 

-0.633 (0.525)

Age 18–24*Women

 

-0.303

(0.570)

 

-0.990**

(0.474)

 

0.628 (0.571)

 

-0.009 (0.662)

 

-0.439 (0.592)

 

-1.386* (0.717)

Age 25 + *Women

 

-0.145

(0.305)

 

-0.372

(0.234)

 

-0.575 (0.535)

 

0.597 (0.537)

 

1.146** (0.417)

 

-0.847* (0.504)

 R2

0.4260

0.4292

0.5841

0.6246

0.4186

0.4535

0.4156

0.4409

0.4265

0.5188

0.3884

0.4119

 N

165

165

105

105

60

60

169

169

68

68

101

101

  1. Note. Robust standard errors were used in the linear regression analyses. Model 2.1 and Model 2.2 applied the same covariates, but Model 2.2 added interaction terms between the onset age of visual impairment and sex
  2. aFor “monthly wages,” the monthly wages were adjusted to 2015 values using the GDP deflator
  3. bIn the regression, we adjusted for disability severity, reason for disability, age, marriage status, education, chronic diseases, self-rated health, job training, and dummy year variables
  4. *p-value < 0.1, **p-value < 0.05