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Table 3 Trends in income inequalities in multimorbidity prevalence among adults in Ontario, 2005 to 2011/12

From: Income inequalities in multimorbidity prevalence in Ontario, Canada: a decomposition analysis of linked survey and health administrative data

CCHS Cycle: 2005 2007/08 2009/10 2011/12 Trend
Relative Index of Inequality
RII (ridit score) 1.376* (1.233,1.535) 1.405* (1.280,1.543) 1.427* (1.290,1.579) 1.321* (1.191,1.466) 1.457* (1.288,1.649)
Age
 35–49 2.402* (2.093,2.756) 2.323* (2.007,2.689) 2.297* (2.011,2.624) 2.039* (1.742,2.387) 2.240* (2.081,2.412)
 50–64 5.531* (4.865,6.287) 5.031* (4.408,5.741) 4.649* (4.151,5.207) 4.116* (3.585,4.726) 4.737* (4.437,5.057)
 65–74 8.098* (7.164,9.155) 7.757* (6.825,8.816) 7.406* (6.620,8.287) 6.293* (5.553,7.131) 7.269* (6.843,7.721)
 75+ 10.287* (9.152,11.564) 9.017* (7.936,10.245) 8.761* (7.859,9.767) 7.667* (6.742,8.719) 8.762* (8.251,9.304)
Sex
 Male 0.832* (0.791,0.876) 0.853* (0.808,0.901) 0.911* (0.862,0.963) 0.884* (0.836,0.935) 0.873* (0.849,0.898)
CCHS Cycle      1.067* (1.036,1.099)
RII*Cycle      0.981 (0.937,1.027)
Constant 0.065 (0.052,0.074)* 0.076 (0.067,0.087)* 0.079 (0.070,0.089)* 0.098 (0.085,0.113) 0.067 (0.061,0.074)*
Slope Index of Inequality
 SII (ridit score) 0.082* (0.054,0.109) 0.099* (0.072,0.127) 0.110* (0.079,0.141) 0.091* (0.057,0.124) 0.082* (0.047,0.116)
Age
 35–49 0.100* (0.085,0.115) 0.114* (0.095,0.132) 0.120* (0.101,0.139) 0.113* (0.089,0.137) 0.112* (0.102,0.122)
 50–64 0.316* (0.294,0.338) 0.338* (0.316,0.360) 0.330* (0.307,0.352) 0.332* (0.305,0.358) 0.329* (0.317,0.341)
 65–74 0.509* (0.483,0.535) 0.581* (0.554,0.608) 0.592* (0.566,0.618) 0.571* (0.546,0.596) 0.564* (0.551,0.577)
 75+ 0.681* (0.657,0.706) 0.703* (0.677,0.729) 0.726* (0.703,0.749) 0.730* (0.703,0.756) 0.711* (0.699,0.723)
Sex
 Male −0.048* (− 0.062,-0.035) −0.048* (− 0.064,-0.032) −0.030* (− 0.048,-0.013) − 0.042* (− 0.060,-0.023) −0.042* (− 0.050,-0.034)
CCHS Cycle      0.013* (0.005,0.021)
SII*Cycle      0.005 (−0.008,0.019)
Constant 0.053* (0.035,0.071) 0.056* (0.037,0.075) 0.048* (0.028,0.069) 0.079* (0.054,0.104) 0.026* (0.005,0.046)
Observations, N: 28,412 29,632 28,388 27,195 113,627
  1. *p < 0.05
  2. Data are regression coefficients from a Poisson regression (relative index of inequality, RII) or a linear probability model (slope index of inequality, SII)
  3. Estimates and corresponding standard errors were estimated with bootstrap sampling weights using balanced repeated replication
  4. For RII*Cycle, a statistically significant interaction with value > 1 (< 1) is indicative of increasing (decreasing) inequality on the relative scale over time; for the SII*Cycle, a positive (negative) and statistically significant interaction is indicative of increasing (decreasing) inequality on the absolute scale over time