Incidence and Prognostic Factors for Legionnaires' Disease in Denmark 1993–2006

Table 6

Uni- and multivariable analyses of prognostic factors for culture-confirmed, notified cases of Legionnaires’ disease, Denmark 1996–2006, 𝑁=419.

Prognostic factor	No. of cases	No. (%) deaths	Univariable OR for death (95% CI)	Multivariable OR for death (95% CI)
Age group
<40 years	18	4 (22%)	1 (reference)	1 (reference)
40–59 years	176	35 (20%)	0.9 (0.3–2.8)	0.9 (0.3–3.0)
60–69 years	101	32 (32%)	1.6 (0.5–5.3)	1.8 (0.5–6.3)
70–79 years	92	33 (36%)	2.0 (0.6–6.4)	1.9 (0.6–6.8)
80+ years	32	20 (63%)	5.8 (1.6–22)	5.5 (1.3–22)
Gender
Male	283	83 (29%)	1 (reference)	1 (reference)
Female	136	41 (30%)	1.0 (0.7–1.6)	0.8 (0.5–1.2)
Comorbidity score
0	66	14 (21%)	1	1
1	105	26 (25%)	1.2 (0.6–2.6)	1.0 (0.5–2.3)
2	94	30 (32%)	1.7 (0.8–3.6)	1.3 (0.6–3.0)
3	59	19 (32%)	1.8 (0.8–4.0)	1.8 (0.7–4.2)
4	48	18 (38%)	2.2 (0.9–5.1)	1.6 (0.6–4.0)
5 or more	47	17 (36%)	2.1 (0.9–4.9)	1.4 (0.5–3.4)
Nosocomial
No	343	96 (28%)	1 (reference)	1 (reference)
Yes	76	28 (37%)	1.5 (0.9–2.5)	0.8 (0.5–1.6)
Travel-associated
No	320	112 (35%)	1 (reference)	1 (reference)
Yes	99	12 (12%)	0.3 (0.1–0.5)	0.3 (0.1–0.6)
Culture result
L pneumophila serogroup 1, Pontiac; (MAb 3/1 pos)	172	36 (21%)	1 (reference)	1 (reference)
L pneumophila serogroup 1,; non-Pontiac (Mab 3/1 neg)	81	24 (30%)	1.6 (0.9–2.9)	0.8 (0.4–1.7)
L pneumophila serogroup 3	95	34 (36%)	2.1 (1.2–3.7)	1.1 (0.6–2.1)
L pneumophila serogroup 6	20	11 (55%)	4.6 (1.8–12)	3.1 (1.1–9.0)
L pneumophila, other	35	13 (37%)	2.2 (1.0–4.9)	1.0 (0.4–2.4)
Nonpneumophila	16	6 (38%)	2.3 (0.8–6.7)	1.4 (0.5–4.5)