Table 4.

Crude and Adjusted Odds Ratios From Logistic Regression Analysis for the Association Between Serogroup, Case Characteristics, Clinical Manifestation, and Death Among Invasive Meningococcal Disease Cases, the Netherlands, January 2015 to June 2018

	Crude		Adjusted
Variables	OR (95% CI)	P	OR (95% CI)	P
Serogroup
Non-Wa	Reference
W	4.2 (2.3–8.2)	<.001	4.3 (2.0–10.2)	<.001
Age
0–9 y	Reference
10–19 y	2.8 (1.0–8.4)	.052	1.4 (.4–4.9)	.551
20–64 y	2.3 (.9–6.4)	.093	0.8 (.3–2.7)	.729
≥65 y	1.7 (.7–5.1)	.283	0.4 (.1–1.6)	.197
Gender
Male	Reference
Female	1.0 (.5–1.8)	.910	0.9 (.4–2.1)	.878
Comorbidities
No	Reference
Yes, immunocompromised	2.4 (.9–5.8)	.055	2.5 (.8–7.5)	.114
Yes, other	0.9 (.3–2.4)	.811	1.3 (.3–4.2)	.685
Clinical manifestations
Meningitis without septicemia	Reference
Septicemia without meningitis	14.3 (5.0–61)	<.001	9.3 (3.0–41)	<.001
Septicemia and meningitis	14.1 (3.9–67)	<.001	11.3 (2.8–57)	.001
Other	2.1 (.5–11)	.325	1.1 (.2–6.1)	.952

For 2018 only until June 2018.

Abbreviations: CI, confidence interval; IMD, invasive meningococcal disease; OR, odds ratio.

^aNon-W includes cases of serogroup B, Y, and C.