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Volume 20, Number 4—April 2014
Research

Epidemic of Mumps among Vaccinated Persons, the Netherlands, 2009–2012

Jussi SaneComments to Author , Sigrid Gouma, Marion Koopmans, Hester de Melker, Corien Swaan, Rob van Binnendijk, and Susan Hahné
Author affiliations: National Institute for Public Health and the Environment, Bilthoven, the Netherlands (J. Sane, S. Gouma, M. Koopmans, H. de Melker, C. Swaan, R. van Binnendijk, S. Hahné); European Programme for Intervention Epidemiology Training, European Centre for Disease Prevention and Control, Stockholm, Sweden (J. Sane); Erasmus Medical Centre, Rotterdam, the Netherlands (S. Gouma, M. Koopmans)

Main Article

Table 2

Demographic characteristics and student status for 1,557 patients with mumps, by annual epidemic season, the Netherlands, September 1, 2009–August 31, 2012*

Characteristic No. (%) case-patients
Season 1, 2009 Sep 1–2010 Aug 31, n = 359 Season 2, 2010 Sep 1–2011 Aug 31, n = 689 Season 3, 2011 Sep 1–2012 Aug 31, n = 509
Sex
M 205 (57.1) 416 (60.4) 296 (58.2)
F 154 (42.9) 271 (39.3) 213 (41.8)
Unknown 0 2 (0.3) 0
Age, y
0–3 3 (0.8) 4 (0.6) 3 (0.6)
4–12 5 (1.4) 22 (3.2) 16 (3.1)
13–17 17 (4.7) 63 (9.1) 54 (10.6)
18–25 270 (75.2) 468 (67.9) 318 (62.4)
>25 64 (17.8) 131 (19) 118 (23.2)
Unknown 0 1 (0.2) 0
Vaccination status
0 doses 57 (15.9) 115 (16.7) 70 (13.7)
1 dose 37 (10.3) 69 (10.0) 51 (10.0)
2 doses 225 (62.7) 436 (63.3) 337 (66.2)
>3 doses 4 (1.1) 4 (0.6) 5 (1.0)
Vaccinated but unknown no. doses 24 (6.7) 25 (3.6) 15 (3.0)
Unknown 12 (3.3) 40 (5.8) 31 (6.1)
Residence in a city with university†
Yes 258 (71.9) 351 (50.9) 243 (47.7)
No 92 (25.6) 322 (46.7) 263 (51.7)
Unknown 9 (2.5) 16 (2.3) 3 (0.6)
Student/contact with students
Not a student and no contact with students 22 (6.1) 171 (24.8) 118 (23.2)
University student or contact with university students 229 (63.8) 275 (39.9) 221 (43.4)
Other student‡ or contact with other students 20 (5.6) 144 (20.9) 88 (17.3)
Unknown 88 (24.5) 99 (14.4) 82 (16.1)
Incidence estimates§
University students 92.9 93.9 80.2
Other students 2.0 14.7 9.8
Secondary school students 0 0.7 5.4

*Boldface indicates significance trends by χ2 test, calculated by using proportions excluding unknowns.
†University cities: Amsterdam, Delft, Eindhoven, Enschede, Groningen, Leiden, Maastricht, Nijmegen, Rotterdam, Stichtse Vecht, Tilburg, Utrecht, and Wageningen.
‡Students enrolled in higher education other than university.
§Incidence per 100,000 students. Total student numbers by category obtained from www.cbs.nl.

Main Article

Page created: March 12, 2014
Page updated: March 12, 2014
Page reviewed: March 12, 2014
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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