Table 3

Association between number of comorbidities and primary care consultations, hospitalisations, and medications prescribed

 Primary care consultationsHospitalisations*Medications
Mean (SD)Rate ratio (95% CI)p ValueMean (SD)Rate ratio (95% CI)p ValueMean (SD)Rate ratio (95% CI)p Value
Number of comorbidities
 Low, 0 or 147.6 (35.2)0.81 (0.78 to 0.85)<0.0012.0 (2.0)0.88 (0.78 to 0.99)0.031152 (205)0.55 (0.52 to 0.59)<0.001
 Moderate, 2 or 355.2 (41.8)Ref2.2 (2.3)Ref254 (307)Ref
 High, 4 or 559.6 (46.0)1.13 (1.09 to 1.17)<0.0012.6 (2.6)1.19 (1.07 to 1.32)0.001320 (376)1.34 (1.27 to 1.43)<0.001
 Very high, ≥663.8 (49.6)1.31 (1.25 to 1.36)<0.0013.4 (6.8)1.62 (1.44 to 1.83)<0.001365 (421)1.68 (1.57 to 1.81)<0.001
Female55.3 (42.8)0.96 (0.93 to 0.99)0.0042.3 (3.7)0.84 (0.77 to 0.92)<0.001279 (351)1.16 (1.1,-1.22)<0.001
Age group
 <75 years69.2 (46.6)Ref2.4 (2.8)Ref295 (372)Ref
 75–79 years61.3 (45.2)1.03 (0.98 to 1.07)0.272.9 (6.2)1.32 (1.15 to 1.50)<0.001287 (344)1.04 (0.96 to 1.12)0.318
 80–84 years57.7 (44.1)1.01 (0.97 to 1.05)0.5632.4 (2.5)1.28 (1.13 to 1.46)<0.001296 (368)1.1 (1.03 to 1.18)0.007
 85–89 years47.9 (38.5)1.03 (0.98 to 1.07)0.2192.3 (2.2)1.55 (1.36 to 1.76)<0.001242 (308)1.04 (0.97 to 1.12)0.293
 ≥90 years40.8 (34.6)1.04 (0.99 to 1.1)0.1092.1 (1.9)1.66 (1.41 to 1.95)<0.001188 (239)1.05 (0.96 to 1.15)0.291
  • Rate ratios derived from negative binomial regression model, adjusted for age and gender. Mean values represent figures over 3 years.

  • *In total,2853 participants included due to missing linked data.