Table 3. emm type distribution of the macrolide-susceptible and macrolide-resistant group A streptococcal isolates.
| emm Type | n | Macrolide-susceptiblea | Macrolide-resistanta | Residualb | P value | Adjusted P valuec |
|---|---|---|---|---|---|---|
| emm1 | 92 | 91 (21.1) | 1 (1.2) | -4.4 | <0.001 | <0.001 |
| emm89 | 71 | 66 (15.3) | 5 (5.9) | -2.3 | 0.021 | 0.300 |
| emm4 | 65 | 60 (13.9) | 5 (5.9) | -2.0 | 0.049 | 0.586 |
| emm12 | 60 | 51 (11.8) | 9 (10.6) | -0.3 | 0.749 | 1.000 |
| emm28 | 58 | 21 (4.9) | 37 (43.5) | 10.3 | <0.001 | <0.001 |
| emm3 | 56 | 56 (13.0) | 0 (0) | -3.5 | <0.001 | 0.006 |
| emm75 | 30 | 29 (6.7) | 1 (1.2) | -2.0 | 0.046 | 0.644 |
| emm6 | 24 | 24 (5.5) | 0 (0) | -2.2 | 0.026 | 0.365 |
| emm77 | 23 | 0 (0) | 23 (27) | 11.1 | <0.001 | <0.001 |
| emm2 | 14 | 14 (3.2) | 0 (0) | -1.7 | 0.092 | 1.000 |
| emm11 | 11 | 8 (1.8) | 3 (3.5) | 1.0 | 0.327 | 1.000 |
| emm87 | 4 | 4 (0.9) | 0 (0) | -0.9 | 0.373 | 1.000 |
| emm48 | 2 | 2 (0.5) | 0 (0) | -0.6 | 0.530 | 1.000 |
| Other | 7 | 6 (1.4)d | 1 (1.2)e | -0.2 | 0.877 | 1.000 |
| Total | 517 | 432 (100.0) | 85 (100.0) |
a Number, percent in parentheses
b Standardized residuals method [36] for the significance of difference between macrolide-susceptible and macrolide-resistant rates
c Bonferroni correction for multiple comparisons
d emm Type (number of isolates): emm8 (n = 1); emm44 (n = 1); emm65 (n = 1); emm76 (n = 1); emm118 (n = 1); emm192 (n = 1)
e emm Type (number of isolates): emm58 (n = 1)