Table 3. Negative Binomial regression analysis of factors associated with hospital admission in the past 12 months among age 15 or above, with interaction of regular source of primary care and number of chronic diseases.

Combination	RR (95%CI)
No regular source of primary care
No chronic disease*	1.00
1 chronic disease	3.591 (3.134–4.114)++
2 chronic diseases	4.147 (3.536–4.864)++
3 or more chronic diseases	5.668 (4.868–6.599)++
Regular source of primary care (from GP)
No chronic disease*	1.210 (1.023–1.432)+
1 chronic disease	2.553 (2.129–3.062)++
2 chronic diseases	2.862 (2.264–3.617)++
3 or more chronic diseases	4.424 (3.627–5.396)++
Regular source of primary care (from Family Physician)
No chronic disease*	1.127 (0.684–1.856)
1 chronic disease	1.837 (1.035–3.26)+
2 chronic diseases	3.133 (1.741–5.638)++
3 or more chronic diseases	5.589 (3.917–7.974)++
Regular source of care (other specialists)
No chronic disease	2.304 (0.895–5.933)
1 chronic disease	4.457 (2.601–7.639)++
2 chronic diseases	5.840 (3.678–9.272)++
3 or more chronic diseases	9.682 (7.161–13.092)++

Figures are relative risks (95% confidence intervals). ⁺p < 0.05. ⁺⁺p < 0.001.

^*Reference category: no regular source of primary care and no chronic disease.