Table 2.
Clinical variables in patients with Lancefield group C and G beta-haemolytic streptococci compared with patients having no growth of group A, C, or G beta-haemolytic streptococci
| Patients with non-group A (%) | Patients with no pathogenic streptococci (%) | Univariate OR(95% CI) | P-value | aMultivariate OR (CI) | P-value | |
|---|---|---|---|---|---|---|
| Prior duration ≤3 days | 29/45 (64) | 184/409 (45) | 2.22 (1.17 to 4.21) | 0.015 | 1.74 (0.88 to 3.42) | 0.110 |
| Cervical glands | 42/45 (93) | 290/404 (72) | 5.50 (1.67 to 18.11) | 0.005 | 4.28 (1.27 to 14.4) | 0.019 |
| Severely inflamed tonsils | 17/45 (38) | 45/397 (11) | 4.75 (2.41 to 9.35) | <0.001 | 3.66 (1.80 to 7.44) | <0.001 |
| Absence of runny nose | 34/45 (76) | 223/409 (55) | 2.58 (1.27 to 5.23) | 0.009 | 2.20 (1.06 to 4.60) | 0.035 |
| Age group <10 years | 0/45 (0) | 32/410 (8) | 0.0 (N/A) | N/A | N/A | N/A |
| Sore throat (moderately bad or worse) | 44/45 (98) | 358/409 (88) | 6.27 (0.84 to 46.5) | 0.073 | 4.05 (0.53 to 30.9) | 0.178 |
| Absence of moderately bad cough | 36/45 (80) | 268/410 (65) | 2.12 (0.99 to 4.52) | 0.052 | 1.40 (0.61 to 3.21) | 0.430 |
| Purulent tonsils | 25/45 (56) | 126/409 (31) | 2.81 (1.50 to 5.24) | 0.001 | 1.57 (0.76 to 3.23) | 0.225 |
| Fever (during last 24 hours) | 34/45 (76) | 235/410 (57) | 2.30 (1.14 to 4.67) | 0.021 | 1.61 (0.75 to 3.43) | 0.219 |
| Moderatelybad muscle aches | 18/45 (40) | 98/409 (24) | 2.12 (1.12 to 4.00) | 0.021 | 2.36 (1.20 to 4.65) | 0.013 |
| Headache | 35/45 (78) | 243/409 (59) | 2.39 (1.15 to 4.96) | 0.019 | 1.79 (0.82 to 3.92) | 0.147 |
a
All multivariate estimates adjusted for cervical glands, severity of inflammation, absence of coryza, muscle aches If other streptococci are included (B and D) then the significant predictors are prior duration, cervical glands, severity of inflammation, and the absence of coryza. OR = odds ratio.