Table 2. Number and (incidence) of laboratory-confirmed cases of pertussis, Denmark, 1995–2013 (n = 13,269).
| Age | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤ 90 da | 46 | 30 | 49 | 35 | 63 | 48 | 60 | 91 | 38 | 68 | 45 | 16 | 34 | 37 | 31 | 25 | 17 | 44 | 15 |
| 0 years total | 80 (115) |
66 (94) |
137 (202) |
74 (109) |
150 (227) |
142 (214) |
162 (241) |
285 (435) |
99 (154) |
215 (330) |
131 (202) |
54 (84) |
80 (123) |
96 (149) |
76 (116) |
69 (109) |
61 (96) |
127 (214) |
64 (110) |
| 1–4 years | 100 (38) |
129 (47) |
334 (120) |
95 (34) |
266 (96) |
182 (66) |
189 (70) |
375 (139) |
83 (31) |
224 (84) |
102 (39) |
28 (11) |
56 (22) |
62 (24) |
57 (22) |
35 (13) |
47 (18) |
133 (51) |
63 (25) |
| 5–9 years | 115 (39) |
146 (48) |
307 (98) |
99 (30) |
331 (99) |
376 (110) |
301 (86) |
726 (207) |
211 (60) |
381 (109) |
138 (40) |
60 (18) |
62 (18) |
84 (25) |
66 (20) |
42 (13) |
29 (9) |
71 (22) |
37 (11) |
| 10–14 years | 18 (7) |
31 (11) |
86 (31) |
17 (6) |
74 (26) |
91 (30) |
94 (30) |
182 (57) |
59 (18) |
187 (55) |
94 (27) |
59 (17) |
101 (29) |
114 (32) |
148 (42) |
59 (17) |
74 (22) |
184 (54) |
72 (21) |
| 15–19 years | 4 (1) |
7 (2) |
9 (3) |
3 (1) |
13 (5) |
10 (4) |
11 (4) |
42 (15) |
12 (4) |
33 (11) |
27 (9) |
14 (4) |
21 (7) |
28 (8) |
50 (15) |
51 (15) |
34 (10) |
89 (25) |
39 (11) |
| 20–29 years | 8 (1) |
12 (2) |
18 (2) |
14 (2) |
19 (3) |
24 (3) |
20 (3) |
46 (7) |
17 (3) |
32 (5) |
10 (2) |
11 (2) |
30 (5) |
26 (4) |
22 (3) |
25 (4) |
20 (3) |
54 (8) |
25 (4) |
| 30–39 years | 25 (3) |
23 (3) |
46 (6) |
25 (3) |
49 (6) |
51 (6) |
85 (10) |
129 (16) |
32 (4) |
80 (10) |
37 (5) |
18 (2) |
33 (4) |
40 (5) |
32 (4) |
24 (3) |
32 (4) |
99 (14) |
52 (7) |
| 40–49 years | 11 (1) |
12 (2) |
15 (2) |
8 (1) |
22 (3) |
18 (2) |
25 (3) |
61 (8) |
18 (2) |
49 (6) |
27 (3) |
11 (1) |
42 (5) |
29 (4) |
55 (7) |
34 (4) |
39 (5) |
115 (14) |
71 (9) |
| ≥ 50 years | 6 (0.4) |
8 (0.5) |
23 (1) |
9 (1) |
23 (1) |
29 (2) |
32 (2) |
59 (3) |
20 (1) |
51 (3) |
30 (2) |
17 (1) |
30 (2) |
34 (2) |
34 (2) |
33 (2) |
36 (2) |
106 (5) |
63 (3) |
| Unknown | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 33 | 15 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 367 (7) |
434 (8) |
975 (18) |
344 (6) |
947 (18) |
923 (17) |
919 (17) |
1,938 (36) |
566 (11) |
1,272 (24) |
596 (11) |
272 (5) |
455 (8) |
513 (9) |
540 (10) |
372 (7) |
372 (7) |
978 (18) |
486 (9) |
Incidences are shown in brackets.
a Incidence could not be calculated for infants ≤ 90 days since populations statistics are not available for age categories shorter than one year.