TABLE 2.
Distribution of the number of H. influenzae isolates by single sampling method and combinations of sampling methods, in the two patient groups and for the merged group
| Sampling method(s)a | No. of subjects positive for H. influenzae
|
||
|---|---|---|---|
| Controls (n = 200) | Patients (n = 300) | Merged data (%b) (n = 500) | |
| OPS | 6 | 13 | 19 (49) |
| NPS | 4 | 8 | 12c (31) |
| NPW | 5 | 17 | 22 (56) |
| NPS and/or NPW | 5 | 20 | 25d (64) |
| OPS and/or NPS | 9 | 20 | 29 (74) |
| OPS and/or NPW | 10 | 26 | 36 (92) |
| OPS and/or NPS and/or NPW | 10 | 29 | 39 (100) |
a
OPS, oropharyngeal swab; NPS, nasopharyngeal swab; NPW, nasopharyngeal washing.
b
Percentage of isolates from the group of subjects positive for H. influenzae by at least one of the three sampling methods.
c
P < 0.04 compared to NPW.
d
Nonsignificant compared to OPS.