Skip to main content

Table 2 Mean health and smoking-related health inequality by disease type and by wave

From: Lifestyle and Income-related Inequality in Health in South Africa

Panel A

Wave 1

Wave 2

 

All smokers

Smoking intensity

Smoking duration

All smokers

Smoking intensity

Smoking duration

Variable

Obs

Mean

CCII

SE

CCIage

SE

Obs

Mean

CCII

SE

CCIage

SE

 Diagnosed of tuberculosis

3,271

0.048

0.001

(0.009)

0.060***

(0.009)

2,640

0.044

0.038***

(0.009)

0.037***

(0.010)

 Have high blood pressure

3,274

0.112

0.053***

(0.013)

0.233***

(0.012)

2,636

0.077

0.043***

(0.013)

0.195***

(0.013)

 Diagnosed of diabetes

3,267

0.021

0.021***

(0.006)

0.057***

(0.007)

2,633

0.019

0.018**

(0.007)

0.053***

(0.007)

 Diagnosed of stroke

3,268

0.008

0.000

(0.004)

0.016***

(0.004)

2,645

0.007

0.001

(0.004)

0.015***

(0.003)

 Diagnosed of heart diseases

3,266

0.026

0.028***

(0.006)

0.054***

(0.006)

2,638

0.015

0.009

(0.006)

0.038***

(0.006)

 Diagnosed of cancer

3,265

0.005

0.019***

(0.004)

0.022***

(0.004)

2,643

0.003

0.002

(0.004)

0.021***

(0.004)

 Have persistent cough

3,259

0.131

0.028**

(0.013)

0.077***

(0.013)

2,646

0.166

−0.005

(0.016)

0.095***

(0.017)

 Experienced depression

3,270

0.460

−0.065***

(0.019)

−0.021

(0.019)

2,632

0.395

−0.168***

(0.21)

−0.065***

(0.022)

 Experienced chest pain

3,253

0.114

0.008

(0.012)

0.082***

(0.013)

2,648

0.104

−0.013

(0.013)

0.099***

(0.014)

 Self-reported poor health

3,259

0.176

0.024***

(0.015)

0.270***

(0.015)

2,651

0.101

−0.001

(0.014)

0.145***

(0.014)

 Health index

3,207

−0.078

0.019***

(0.006)

0.089***

(0.005)

2,562

0.086

−0.002

(0.007)

0.085***

(0.007)

Panel B

Wave 3

Wave 4

 

All smokers

Smoking intensity

Smoking duration

All smokers

Smoking intensity

Smoking duration

 

Obs

Mean

CCII

SE

CCIage

SE

Obs

Mean

CCI

SE

CCIage

SE

 Diagnosed of tuberculosis

3,235

0.072

0.010

(0.010)

0.056***

(0.010)

4,038

0.056

0.021***

(0.008)

0.022***

(0.008)

 Have high blood pressure

3,232

0.139

0.067***

(0.014)

0.280***

(0.013)

3,897

0.098

0.025**

(0.011)

0.186***

(0.011)

 Diagnosed of diabetes

3,231

0.030

0.048***

(0.008)

0.093***

(0.008)

4,176

0.027

0.022***

(0.006)

0.073***

(0.006)

 Diagnosed of stroke

3,235

0.006

0.004

(0.003)

0.012***

(0.003)

4,240

0.010

0.003

(0.004)

0.032***

(0.004)

 Diagnosed of heart diseases

3,238

0.041

0.026***

(0.008)

0.086***

(0.008)

4,179

0.020

0.014***

(0.005)

0.039***

(0.005)

 Diagnosed of cancer

3,236

0.007

0.012**

(0.003)

0.012***

(0.003)

4,250

0.016

0.035***

(0.005)

0.010**

(0.004)

 Have persistent cough

3,239

0.211

0.023

(0.016)

0.118***

(0.016)

4,265

0.168

0.015

(0.012)

0.059***

(0.012)

 Experienced depression

3,222

0.451

−0.064***

(0.019)

−0.022

(0.020)

4,263

0.505

−0.071***

(0.017)

−0.022

(0.016)

 Experienced chest pain

3,239

0.112

0.000

(0.012)

0.042***

(0.013)

4,264

0.128

0.012

(0.011)

0.093***

(0.011)

 Self-reported poor health

3,238

0.137

0.061***

(0.013)

0.203***

(0.013)

4,262

0.126

0.022**

(0.011)

0.193***

(0.011)

 Health index

3,185

0.117

0.023***

(0.006)

0.087***

(0.006)

3,606

0.185

0.006**

(0.017)

0.050***

(0.003)

  1. Notes: Results presented in this table are corrected concentration indices for smoking-related health inequality. The health indicators are all binary outcomes equivalent to 1 if the respondent is diagnosed of a given disease. The health index is continuous with high values representing poor health outcomes. The cigarette smoking variables are both continuous. Positive values of smoking-related health inequality indices indicate that poor health is concentrated among heavy smokers and those with longer smoking duration. ***Statistically significant at the 1% level; statistically significant at the 5% level; *statistically significant at the 10% level