Table 3.
Estimates of decomposition analysis for contribution of various explanatory variables for cognitive impairment among older adults
| Variables | Coef. (95% CI) | Elasticity | CCI | Absolute contribution to CCI | % contribution | |
|---|---|---|---|---|---|---|
| Self-perceived income sufficiency | ||||||
| Has income and fully sufficient | Ref. | |||||
| Has income and partially sufficient | 0.33*(0.19,0.46) | 0.018 | −0.065 | − 0.001 | 2.5 | 3.0 |
| Has income and not sufficient | 0.29*(0.07,0.52) | 0.003 | − 0.121 | 0.000 | 0.8 | |
| No income | 0.22*(0.07,0.37) | 0.013 | 0.014 | 0.000 | −0.4 | |
| Work Status (last one year) | ||||||
| Never worked | Ref. | |||||
| Currently working | −0.13(− 0.28,0.02) | − 0.010 | − 0.176 | 0.002 | −3.9 | 0.7 |
| Retired | − 0.26*(− 0.46,-0.07) | − 0.004 | 0.516 | −0.002 | 4.6 | |
| Educational status | ||||||
| Not educated | Ref. | |||||
| Below 5 years | −0.37*(− 0.51,-0.24) | −0.011 | − 0.001 | 0.000 | 0.0 | 44.6 |
| 6 to 10 years | −0.80*(− 0.94,-0.66) | −0.041 | 0.259 | −0.011 | 23.0 | |
| 11+ years | −1.27*(−1.50,-1.04) | −0.016 | 0.621 | −0.010 | 21.5 | |
| Marital status | ||||||
| Not in union | Ref. | |||||
| Currently in union | −0.17*(−0.28,-0.05) | − 0.019 | 0.039 | − 0.001 | 1.6 | 1.6 |
| Asset ownership | ||||||
| No | Ref. | |||||
| Yes | −0.19*(− 0.33,-0.06) | −0.030 | 0.025 | −0.001 | 1.6 | 1.6 |
| Age group (in years) | ||||||
| 60-69 | Ref. | |||||
| 70-79 | 0.39*(0.28,0.5) | 0.019 | −0.014 | 0.000 | 0.6 | 0.0 |
| 80+ | 0.65*(0.46,0.84) | 0.012 | 0.024 | 0.000 | −0.6 | |
| Gender | ||||||
| Men | Ref. | |||||
| Women | 0.04(−0.09,0.16) | 0.009 | −0.033 | 0.000 | 0.6 | 0.6 |
| Co-residing with children | ||||||
| No | Ref. | |||||
| Yes | −0.05(−0.16,0.06) | −0.008 | 0.090 | −0.001 | 1.5 | 1.5 |
| Self-rated health | ||||||
| Good | Ref. | |||||
| Poor | 0.25*(0.14,0.35) | 0.033 | −0.038 | −0.001 | 2.7 | 2.7 |
| IADL | ||||||
| High | Ref. | |||||
| Low | 0.23*(0.12,0.33) | 0.028 | −0.062 | −0.002 | 3.7 | 3.7 |
| ADL | ||||||
| High | Ref. | |||||
| Low | 0.65*(0.42,0.88) | 0.005 | −0.011 | 0.000 | 0.1 | 0.1 |
| Subjective well-being | ||||||
| High | Ref. | |||||
| Low | 0.12*(0.02,0.25) | 0.004 | −0.283 | −0.001 | 2.5 | 2.5 |
| Psychological health | ||||||
| High | Ref. | |||||
| Low | 0.46*(0.32,0.6) | 0.023 | −0.233 | −0.005 | 11.5 | 11.5 |
| Wealth status | ||||||
| Poorest | Ref. | |||||
| Poorer | 0.08(−0.08,0.24) | 0.002 | −0.338 | −0.001 | 1.7 | 31.8 |
| Middle | −0.07(− 0.24,0.11) | −0.001 | 0.140 | 0.000 | 0.4 | |
| Richer | −0.34*(− 0.53,-0.15) | −0.014 | 0.522 | −0.007 | 16.2 | |
| Richest | −0.36*(− 0.57,-0.16) | −0.008 | 0.763 | −0.006 | 13.6 | |
| Religion | ||||||
| Hindu | Ref. | |||||
| Muslims | −0.1(−0.31,0.11) | −0.002 | 0.148 | 0.000 | 0.7 | −1.5 |
| Sikh | −0.08(− 0.31,0.16) | 0.000 | 0.296 | 0.000 | −0.3 | |
| Others | 0.26*(0.02,0.5) | 0.003 | 0.319 | 0.001 | −1.9 | |
| Caste | ||||||
| Scheduled Caste | Ref. | |||||
| Scheduled Tribe | 0.01(−0.24,0.26) | 0.002 | −0.445 | − 0.001 | 2.2 | 3.7 |
| Other Backward Class | −0.02(− 0.17,0.13) | 0.005 | − 0.029 | 0.000 | 0.3 | |
| Others | −0.04(− 0.18,0.11) | −0.002 | 0.222 | −0.001 | 1.2 | |
| Place of residence | ||||||
| Rural | Ref. | |||||
| Urban | −0.10(−0.21,0.01) | 0.000 | 0.253 | 0.000 | 0.1 | |
| State | ||||||
| Himachal Pradesh | Ref. | |||||
| Punjab | 0.14(−0.07,0.36) | 0.000 | 0.318 | 0.000 | 0.2 | −8.2 |
| West Bengal | 1.48*(1.27,1.7) | 0.028 | −0.162 | −0.005 | 10.0 | |
| Orissa | 0.50*(0.32,0.69) | 0.011 | −0.366 | −0.004 | 8.6 | |
| Maharashtra | 0.14(−0.04,0.32) | −0.001 | − 0.116 | 0.000 | − 0.2 | |
| Kerala | 0.85*(0.66,1.05) | 0.022 | 0.351 | 0.008 | −16.4 | |
| Tamil Nadu | −0.53*(−0.74,-0.33) | − 0.022 | −0.217 | 0.005 | −10.4 | |
| Calculated CCI | −0.046 | 100.0 | 100.0 | |||
| Actual CCI | −0.100 | |||||
| Residual | −0.054 | |||||
CI Confidence interval, CCI Concentration index, *if p > 0.05, % Percentage, IADL Instrumental activities of daily living, ADL Activities of daily living