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Table 2 Comparability in age, sex and number of chronic diseases by groups, before and after propensity score matching

From: Better health outcomes at lower costs: the benefits of primary care utilisation for chronic disease management in remote Indigenous communities in Australia’s Northern Territory

Proportions Low primary care (n = 6987) Medium primary care (n = 5926) High primary care (n = 1271) χ2significance
Before PSM After PSM Before PSM After PSM Before PSM After PSM Before PSM After PSM
Age
15- 48% 20% 47% 19% 20% 20% 523.3** 2.04 -
30- 24% 23% 25% 25% 23% 23%   
40- 14% 26% 15% 27% 27% 27%   
50- 7% 18% 8% 17% 17% 17%   
60- 7% 13% 5% 12% 13% 13%   
Sex
Male 50% 35% 39% 35% 33% 33% 523.3** 2.07 -
Female 50% 65% 61% 65% 67% 67%   
Number of chronic diseases
0 63% 10% 43% 10% 10% 10% 2004.8** 11.12 -
1 17% 16% 22% 16% 16% 16%   
2 9% 22% 17% 23% 23% 23%   
3 7% 28% 13% 30% 31% 31%   
4 4% 20% 5% 17% 16% 16%   
5 1% 4% 1% 5% 5% 5%   
  1. Note: n = number of patients; - p > 0.05; *p < 0.05; **p < 0.01; PSM = propensity score matching.