Table 1.
Clinical variables in patients with Lancefield Group A beta-haemolytic streptococci (n = 136) compared with all other patients
| Patients with Group A (%) | Patients with no Group A (%) | Univariate OR (95% CI) | P-value | aMultivariate OR (CI) | P-value | |
|---|---|---|---|---|---|---|
| Prior duration ≤3 days | 94/135 (70) | 213/454 (47) | 2.59 (1.72 to 3.91) | <0.001 | 1.92 (1.23 to 3.01) | 0.004 |
| Cervical glands | 121/133 (91) | 332/449 (74) | 3.55 (1.89 to 6.67) | <0.001 | 2.63 (1.32 to 5.23) | 0.006 |
| Severely inflamed tonsils | 39/132 (30) | 62/442 (14) | 2.57 (1.62 to 4.07) | <0.001 | 1.63 (0.98 to 2.69) | 0.059 |
| Absence of runny nose | 96/135 (71) | 257/454 (57) | 1.89 (1.24 to 2.86) | 0.003 | 1.29 (0.81 to 2.05) | 0.284 |
| Age group <10 years | 32/136 (24) | 32/455 (7) | 4.07 (2.38 to 6.94) | <0.001 | 3.49 (1.89 to 6.43) | <0.001 |
| Sore throat (moderately bad or worse) | 131/136 (96) | 402/454 (89) | 3.39 (1.33 to 8.66) | 0.011 | 3.26 (1.11 to 9.53) | 0.031 |
| Absence of moderately bad cough | 123/136 (90) | 304/455 (67) | 4.70 (2.57 to 8.60) | <0.001 | 4.02 (2.13 to 7.57) | <0.001 |
| Purulent tonsils | 70/135 (52) | 151/454 (33) | 2.16 (1.46 to 3.19) | <0.001 | 1.23 (0.79 to 1.91) | 0.352 |
| Fever (during last 24 hours) | 109/136 (80) | 269/455 (59) | 2.79 (1.76 to 4.43) | <0.001 | 1.82(1.09 to 3.02) | 0.021 |
| Moderately bad muscle aches | 52/135 (39) | 116/454 (26) | 1.83 (1.22 to 2.74) | 0.004 | 1.85 (1.18 to 2.91) | 0.008 |
| Headache | 100/136 (74) | 278/454 (61) | 1.76 (1.15 to 2.69) | 0.009 | 1.28 (0.79 to 2.07) | 0.318 |
a
Multivariate model controlled for prior duration cervical glands, severe sore throat, absence of cough, bad muscle aches, and fever. OR = odds ratio.