TABLE 3.
Distribution of samples collected and samples positive for M. pneumoniae over the five periods of surveillance and among age groups
| Age of patients (yr) | Winter 1992–1993
|
Winter 1993–1994
|
Winter 1994–1995
|
Winter 1995–1996
|
Winter 1996–1997
|
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. of samples (% of total) | No. of samples positive for M. pneumoniae (% of total) | No. of samples (% of total) | No. of samples positive for M. pneumoniae (% of total) | No. of samples (% of total) | No. of samples positive for M. pneumoniae (% of total) | No. of samples (% of total) | No. of samples positive for M. pneumoniae (% of total) | No. of samples (% of total) | No. of samples positive for M. pneumoniae (% of total) | |
| <4 | 283 (29.5) | 32 (11.3) | 242 (35.1) | 21 (31.3) | 377 (40.4) | 41 (50.6) | 278 (36.3) | 7 (46.7) | 137 (25.0) | 4 (17.4) |
| 5–14 | 220 (22.9) | 24 (10.9) | 118 (17.1) | 8 (6.8) | 155 (16.6) | 14 (9.0) | 177 (23.1) | 3 (1.7) | 91 (16.6) | 4 (4.4) |
| 15–29 | 147 (15.3) | 15 (10.2) | 122 (17.7) | 11 (9.0) | 128 (13.7) | 10 (7.8) | 103 (13.4) | 1 (1.0) | 98 (17.9) | 5 (5.1) |
| 30–44 | 135 (14.1) | 12 (8.9) | 106 (15.4) | 14 (13.2) | 134 (14.4) | 6 (4.5) | 113 (14.8) | 1 (0.9) | 86 (15.7) | 2 (2.3) |
| 45–59 | 55 (5.7) | 7 (12.7) | 55 (8.0) | 9 (16.4) | 78 (8.4) | 6 (7.7) | 48 (6.3) | 1 (2.1) | 61 (11.1) | 3 (4.9) |
| 60–65 | 23 (2.4) | 3 (13.0) | 10 (1.4) | 1 (10.0) | 16 (1.7) | 0 | 10 (1.3) | 0 | 21 (3.8) | 0 |
| >65 | 18 (1.9) | 0 | 22 (3.2) | 2 (9.1) | 32 (3.4) | 3 (9.4) | 16 (2.1) | 1 (6.3) | 36 (6.6) | 4 (11.1) |
| ? | 78 (8.1) | 4 (5.1) | 15 (2.2) | 1 (6.7) | 13 (1.4) | 1 (7.7) | 21 (2.7) | 1 (4.8) | 19 (3.5) | 1 (5.3) |
| Total | 959 | 97 (10.1) | 690 | 67 (9.7) | 933 | 81 (8.7) | 766 | 15 (2.0) | 549 | 23 (4.2) |