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Table 3 Incidence rate ratios of prescription drug use among patients in primary health care

From: Drugs prescribed by general practitioners according to age, gender and socioeconomic status after adjustment for multimorbidity level

Variables IRR (CI 95%) p-value IRR (CI 95%)* p-value
Gender     
Females 1   1  
Males 1.06 (1.04-1.09) <0.001 0.99 (0.96-1.02) 0.674
Age     
20-39 1   1  
40-59 2.41 (2.31-2.52) <0.001 2.29 (2.19-2.39) <0.001
60-79 4.34 (4.12-4.57) <0.001 3.78 (3.62-3.96) <0.001
80- 6.24 (5.79-6.72) <0.001   
Multimorbidity level     
RUB 0 (low) 1   1  
RUB 1 0.74 (0.71-0.78) <0.001 0.69 (0.66-0.73) <0.001
RUB 2 0.94 (0.90-0.98) 0.004 0.92 (0.88-0.97) 0.001
RUB 3 1.33 (1.29-1.37) <0.001 1.35 (1.30-1.41) <0.001
RUB 4 1.66 (1.58-1.74) <0.001 1.89 (1.74-2.05) <0.001
RUB 5 (high) 1.75 (1.63-1.86) <0.001 2.26 (2.00-2.55) <0.001
Income     
1 (low) 1   -  
2 1.00 (0.98-1.03) 0.811 -  
3 0.78 (0.75-0.81) <0.001 -  
4 (high) 0.70 (0.68-0.72) <0.001 -  
Education     
1 (low) -   1  
2 -   0.97 (0.91-1.02) 0.227
3 -   0.82 (0.80-0.85) <0.001
4 (high) -   0.70 (0.67-0.73) <0.001
  1. *Including patients up to 70 years old.