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. 2018 Sep 24;13(9):e0199691. doi: 10.1371/journal.pone.0199691

Table 3. Results of gamma-log GLMs for cost outcomes evaluated from the hospital perspective: Total, ambulatory, and ED costs.

Total monthly hospital costs Monthly ambulatory costs Monthly ED costs
RR Std. Err. 95% CI P value RR Std. Err. 95% CI P value RR Std. Err. 95% CI P value
Group (ref = CM group) 0.86 0.17 0.59–1.27 0.45 0.94 0.19 0.63–1.39 0.75 0.84 0.12 0.63–1.13 0.26
Dying during follow-up (ref. = alive at the end of follow-up) 3.69*** 1.30 1.85–7.35 <0.001 1.08 0.35 0.57–2.06 0.81 2.33** 0.66 1.34–4.07 <0.003
Age 1.02*** 0.00 1.01–1.04 <0.001 1.01 0.00 1.00–1.02 0.23 1.02*** 0.00 1.01–1.03 <0.001
Swiss citizenship (ref. = no Swiss citizenship) 1.73* 0.37 1.13–2.64 0.01 1.31 0.26 0.89–1.93 0.18 1.81*** 0.30 1.31–2.51 <0.001
Male gender 0.83 0.16 0.57–1.21 0.33 0.91 0.15 0.65–1.27 0.58 0.73* 0.11 0.55–0.99 0.04
Social difficulty 1.44 0.29 0.97–2.15 0.07 1.58* 0.30 1.09–2.29 0.02 1.69*** 0.27 1.24–2.31 <0.001
Somatic condition 0.85 0.20 0.54–1.36 0.51 0.88 0.22 0.54–1.46 0.63 1.2 0.20 0.85–1.69 0.3
Mental health problem 1.45 0.28 0.99–2.11 0.06 1.47* 0.27 1.03–2.11 0.03 1.12 0.16 0.83–1.51 0.45
Risky behavior 0.72 0.16 0.46–1.12 0.14 0.66 0.15 0.43–1.02 0.06 0.88 0.15 0.62–1.24 0.46
Not having primary care physician 1.09 0.31 0.61–1.93 0.78 1.23 0.38 0.67–2.28 0.51 1.04 0.25 0.65–1.68 0.86
AIC = 18 BIC = −819.049 AIC = 15.12 BIC = −938.90 AIC = 13.51 BIC = −1069.22
Observations 250 250 250

Notes: The 3 main outcomes of hospital costs were analyzed. RR: relative risk (exponentiated coefficients); Std. Err.: standard error; CI: confidence interval;

AIC: Akaike information criterion; BIC: Bayesian information criterion.

* p < 0.05.

** p < 0.01.

*** p < 0.001