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Table 3 Decomposition of E of poor mental health (n = 130,078)

From: Decomposing socioeconomic inequality in poor mental health among Iranian adult population: results from the PERSIAN cohort study

 CoefficientConcentration indexContributionContribution%Summed
Age groups    12.703
 35–40Ref.
 40–45.08940030.05240.0001−1.2071
 45–50.21506070.0300.0002−1.6621
 50–55.3051117−0.0048−0.00000.3805
 55–60.3049626−0.0577− 0.00054.5390
 60–65.2760597−0.0788−0.00075.6091
 65 and older.308196−0.0635−0.00065.0436
Gender    19.927
 Male−.433600.1783−0.002419.9270
 FemaleRef.
Marital status    1.9963
 SingleRef.   
 Married−0.06110.0933−0.00021.4656
 Divorced0.0217−0.0779−0.00010.4353
 Widowed0.0879−0.005−0.00000.1132
 Other−0.0986−0.00070.0000−0.0178
Water-pipe use    −1.1424
 NoRef.   
 Yes0.06230.07120.0001−1.1424
Alcohol Use    0.8492
 NoRef.   
 Yes−0.04870.0677−0.00010.8492
Drug use    0.3762
 NoRef.   
 yes0.1552−0.0094−0.00000.3762
Smoking status    −0.1247
 Non-smokerRef.   
 Ex-smoker0.21844−0.0006−0.00000.0336
 Smoker0.124330.00490.0000−0.1583
BMI    −0.7472
 Underweight0.01042−0.0225−0.00000.0605
 NormalRef.   
 Overweight0.027850.07840.0001−0.5632
 Obese0.042230.02250.0000−0.2445
Physical activity (Daily METs)    −5.7784
 Inactive (24–36.5)Ref.   
 Middle (36.6–44.9)−0.19560.0703−0.00043.5431
 Active (≥45)−0.3385−0.10680.0011−9.3215
Socioeconomic status    10.0531
 1st SES quintile (Poorest)Ref.   
 2nd SES quintile0.03825−0.3191−0.00043.1463
 3rd SES quintile0.051550.00120.0000−0.0154
 4th SES quintile0.000510.31970.0000−0.0421
 5th SES quintile (Richest)−0.042230.6397−0.00086.9643
Region of cohort (province)    −11.0293
 Fars (FA)Ref.   
 Kermanshah (KSH)−0.3517−0.02090.0002−1.8938
 Guilan (GU)0.19355−0.0483−0.00032.4108
 East Azerbaijan (EA)0.1363−0.0057−0.00000.1992
 Mazandaran (MA)0.30110.04610.0004−3.5757
 Sistan and Balouchestan (SB)0.30560.00820.0001−0.6435
 Yazd (YA)0.06540.05360.0001−0.9046
 Kerman (KE)0.16880.08470.0004−3.6822
 Khuzestan (KH)−0.6571−0.04970.0010−8.4243
 Chaharmahal and Bakhtiari (CB)0.09560.09210.0003−2.2701
 Hormozgan (HO)−0.2641−0.00560.0000−0.3815
 West Azerbaijan (WA)−0.1006−0.01830.0001−0.4738
 Ardabil (AR)−0.12150.0551−0.00021.7239
 Razavi Khorasan (RK)−0.49750.0537−0.00086.8863
 Total    27.083
 Residual    72.917
 The E  −0.012 100.0
  1. Physical activity (Daily METs): A MET is equal to resting metabolic rate, the amount of oxygen consumed at rest that is about 3.5 ml 02/kg/min
  2. Ref. indicated reference group in the regression estimation