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. 2016 Nov 25;113(47):791–798. doi: 10.3238/arztebl.2016.0791

Table 5. Secondary comparative outcomes (difference in differences [DiD]) for pharmacotherapy.

Outcome measure (secondary) t1 t2 t2 vs t1 DiD
Pharmacotherapy IG
(SD)
CG
(SD)
IG
(SD)
CG
(SD)
IG CG Absolute
intervention effect*3
(p-value [95% CI])
Relative
change*4
%
Number of drug prescriptions per patient*1 26.4
(23.2)
26.8
(23.4)
28.8
(24.0)
29.1
(24.0)
2.4 2.3 0.1
(0.156 [−0.04; 0.28])
0.4
Number of different medications (ATC-7)
per patient*1
7.67
(5.48)
7.67
(5.62)
8.14
(5.66)
8.09
(5.90)
0.48 0.42 0.06
(0.035 [0.004; 0.11])
0.7
Share of patients with 5 or more different
medications (GP prescriptions. ATC-7)*2
57.2% 55.9% 61.3% 58.4% 4.1*5 2.6*5 1.15
(<0.001 [1.11; 1.19])
15

p<0.05. statistically significant difference (t-test respectively chi square test); *1 binary variable; *2 metric variable; *3 intervention effect for metric variables: mean difference; intervention effect for binary variables: odds ratio; *4 relative change for metric variables: share of intervention effect in IG t1 in %; relative change for binary variables: odds ratio –1. i.e. percentage change in odds;

*5 percentage points; ATC. anatomical therapeutic chemical classification system [full 7-digit form of ATC codes];

IG. intervention group; CG. control group; CI. confidence interval; SD. standard deviation