Correction: Complementary medicine usage in surgery: a cross-sectional survey in Germany

Table 2 Factors affecting usage of complementary medicine

Parameter	Regression coefficient	Standard error	p^a	Odds ratio	95%-Confidence Interval
Parameter	Regression coefficient	Standard error	p^a	Odds ratio	Lower	Upper
Age	0.002	0.016	0.890	1.002	0.972	1.033
Sex
Male	Reference	Reference	Reference	Reference	Reference	Reference
Female	-0.297	0.436	0.496	0.743	0.316	1.747
Location
Freiburg	Reference	Reference	Reference	Reference	Reference	Reference
Ulm	2.151	0.470	<0.001	8.590	3.417	21.596
Heidelberg	2.169	0.651	0.001	8.754	2.443	31.361
Cancer
Yes	-0.505	0.519	0.330	0.603	0.218	1.669
No	Reference	Reference	Reference	Reference	Reference	Reference
Nationality
German	Reference	Reference	Reference	Reference	Reference	Reference
Other	0.422	0.772	0.585	1.524	0.335	6.927

Goodness-of-fit was assessed using the Hosmer-Lemeshow-Test, indicating a good model fit, χ²(8) = 4.670, p = 0.792
Only patients for whom a complete data set was available were evaluated (n = 125)
^aMultiple logistic regression, highest sample-size group was chosen as reference

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