Table 3.
Culture results according to Centor criteria.
| Variables | Culture | χ2 | P* | ||
|---|---|---|---|---|---|
| Positive (n=56; 16.5%) | Negative (n=283;83.5%) | Total (n=339) | |||
|
| |||||
| Number of Centor criteria | 8.156 (df=4) | 0.086 | |||
|
| |||||
| Absent | 13 (26.5) | 36 (73.5) | 49 (14.5) | 4.163 | 0.041 |
|
| |||||
| 1 | 24 (18.9) | 103 (81.1) | 127 (37.5) | 0.833 | 0.361 |
|
| |||||
| 2 | 14 (9.1) | 96 (91.9) | 110 (32.4) | 1.698 | 0.193 |
|
| |||||
| 3 | 3 (6.9) | 40 (83.1) | 43 (12.7) | 3.252 | 0.071 |
|
| |||||
| 4 | 2 (20.0) | 8 (80.0) | 10 (2.9) | 0.091 | 0.764 |
|
| |||||
| Centor criteria | |||||
|
| |||||
| Absence of cough | 24.341 | 0.0001 | |||
|
| |||||
| No | 39 (28.7) | 97 (71.3) | 136 (40.1) | ||
|
| |||||
| Yes | 17 (8.4) | 186 (91.6) | 203 (59.9) | ||
|
| |||||
| Tonsiller exudate | 5.606 | 0.018 | |||
|
| |||||
| No | 42 (14.5) | 247 (85.5) | 289 (85.2) | ||
|
| |||||
| Yes | 14 (28.0) | 36 (72.0) | 50 (14.8) | ||
|
| |||||
| Swollen tender anterior cervical lymph nodes | 4.551 | 0.033 | |||
|
| |||||
| No | 31 (13.5) | 198 (86.5) | 229 (67.6) | ||
|
| |||||
| Yes | 25 (22.7) | 85 (77.3) | 110 (32.4) | ||
|
| |||||
| History of fever (>37.5ºC) | 4.288 | 0.038 | |||
|
| |||||
| No | 22 (12.5) | 154 (87.5) | 176 (51.9) | ||
|
| |||||
| Yes | 34 (20.9) | 129 (79.1) | 163 (48.1) | ||
*
For comparison of positive vs. negative cultures.