(a) The influence of clinical subgroup, age, gender, comorbidity, and work status on total health care costs (sum of cost groups 1 to 3 for rehabilitation period and 6 months after) for patients with inflammatory disease. The results are presented as Unstandardised Coefficients () with 95% Confidence intervals
Variable
Model 1
Model 2
Model 3
Model 4
Clinical subgroup
Inflammatory disease rehab center
Ref.
Ref.
Ref.
Ref.
Inflammatory disease inpatient hospital unit
13,412 (8,744 to 18,080)**
12,952 (8,299 to 17,605)**
12,935 (8,173 to 17697)**
13,721 (8,806 to 18,635)**
Inflammatory disease outpatient hospital unit
−2,595 (−9,388 to 4,196)
−2,406 (−5,875 to 3,727)
−2,560 (−9,514 to 4,395)
−73 (−7,089 to 6,940)
Gender (ref. female) Male
−2,968 (−8,055 to 2,118)
−3,272 (−8,371 to 1,826)
−3,555 (−8,744 to 1,633)*
−4,025 (−9,402 to 1,352)
Age (ref. 67 or less) 68+
1,682 (−4,712 to 8,077)
1,843 (−4,583 to 8,271)
4,430 (−1,762 to 10,624)
4,045 (−2,379 to 10,469)
Comorbidity (ref. none)
One
3,170 (−2,373 to 8,714)
3,291 (−2,282 to 8,864)
3,795 (−1,849 to 9,439)
4,851 (−1,002 to 10,632)
Two or more
2,939 (−2,830 to 8,708)
2,274 (−3,457 to 8,005)
2,885 (−3,003 to 8,775)
3,346 (−2,759 to 9,452)
Working status (ref. employed) Not employed
1,732 (−3,288 to 6,753)
1,716 (−3,333 to 6,765)
448 (−4,589 to 5,485)
402 (−4,827 to 5,632)
MHAQ
−5,179 (−12,174 to 1,815)
—
1,151 (−4,092 to 6,396)
4,122 (−921 to 9,166)*
SF Physical function
−172 (−301 to −42)**
−106 (−202 to −11)*
—
—
SF Mental function
−1 (−21to 19)
41 (−21 to 19)
—
—
Assistive tools
1,447 (414 to 2,540)**
1,315 (268 to 2,361)*
1,619 (542 to 2,695)**
—
Constant
16,367 (4,568 to 28,168)**
10,292 (10763 to 18,819)**
3,367 (−3,134 to 9,869)
2,178 (−4,522 to 8,878)
Adj R-squared
0.3593
0.3518
0.3276
0.2750
Cost values (in Euro) are estimated means by OLS. All costs are presented in Euros: 1€ = 8 NOK.
*
P-value < .05, **P-value < .01. The difference between the three models is only the inclusion of different severity measures in addition to clinical setting, diagnosis, age, gender, and working status. Model 1: all severity measures are included: MHAQ, SF36 Physical function, SF36 Mental function, and assistive tools. Model 2: we include only SF36 Physical function, SF36 Mental function and assistive tools. Model 3: we include only MHAQ and assistive tools. Model 4: we include only MHAQ.
(b) The influence of clinical subgroup, age, gender, comorbidity, and work status on total health care costs (sum of cost groups 1 to 3 for rehabilitation period and 6 months after) for patients with osteoarthritis (OA). The results are presented as Unstandardised Coefficients () with 95% Confidence intervals
Variable
Model 1
Model 2
Model 3
Model 4
Clinical subgroup
OA (ref. conventional rehabilitation)
Ref.
Ref.
Ref.
Ref.
OA postsurgery rehabilitation
−675 (−2,664 to 1,313)
−220 (−2,135 to 1,694)
−683 (−2,658 to 1,290)
−57 (−2,723 to1,207)
Gender (ref. female) Male
−2,086 (−4,166 to −6)*
−2,037 (−4,125 to −50)
−2,103 (−4,142 to −65)*
1,915 (−3,903 to 72)
Age (ref. 67 or less) 68+
651 (−1,282 to 2585)
386 (−1,527 to 2,300)
693 (−1,217 to 2,605)
578 (−1,312 to 2,468)
Comorbidity (ref. none)
One
1,054 (−1,445 to 3,554)
1,080 (−1,429 to 3,590)
1,178 (−1,265 to 3,622)
1,148 (−1,292 to 3,589)
Two or more
1,341 (−1,160 to 3,842)
1,470 (−1,036 to 3,977)
1,514 (−891 to 3,920)
1,507 (−335 to 3,163)
Working status (ref. employed) Not employed
192 (−1,805 to 2,190)
−34 (−2,020 to 1,951)
263 (−1,707 to 2,234)
128 (−1,814 to 2,072)
MHAQ
1,512 (−365 to 3,390)
—
1,614 (−199 to 3,428)
1,414 (−335 to 3,163)
SF Physical function
−2 (−13 to 9)
−4 (−15 to 6)
—
—
SF Mental function
−1 (−9 to 6)
−2 (−9 to 6)
—
—
Assistive tools
−216 (−738 to 305)
−106 (−612 to 399)
−220 (−739 to 299)
—
Constant
6,592 (3,301 to 9,882)**
7,650 (4,621 to 10,679)**
6,158 (3,303 to 9,013)**
6,244 (3,399 to 9,090)**
Adj R-squared
0.0101
0.0128
0.0193
0.0209
Cost values (in Euro) are estimated means by OLS. All costs are presented in Euros: 1€ = 8 NOK.
*
-value < .05, **-value < .01. The difference between the three models is only the inclusion of different severity measures in addition to clinical setting, diagnosis, age, gender and working status. Model 1: all severity measures are included: MHAQ, SF36 Physical function, SF36 Mental function, and assistive tools. Model 2: we include only SF36 Physical function, SF36 Mental function, and assistive tools. Model 3: we include only MHAQ and assistive tools. Model 4: we include only MHAQ.