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Table 2 Univariate linear regression analysis of bacterial load by known variables
From: Viral-bacterial co-infection in Australian Indigenous children with acute otitis media
| Variables | N | Geometric Mean Bacterial Load (SD) | Coefficient (95% CI) | P | ||
|---|---|---|---|---|---|---|
| M. catarrhalis | Sex | Male | 180 | 14.26(2.89) | -0.29(-0.82 to 0.24) | 0.279 |
| Female | 186 | 13.77(3.89) | ||||
| Age category | <3mo | 36 | 11.59(5.96) | -2.31(-3.44 to -1.18) | <0.001 | |
| 3-6mo | 95 | 14.41(2.92) | -0.45(-1.37 to 0.47) | 0.336 | ||
| 6-9mo | 122 | 13.85(3.51) | -0.88(-1.77 to 0.00) | 0.051 | ||
| 9-12mo | 71 | 14.50(1.77) | -0.47(-1.44 to -0.49) | 0.335 | ||
| >12mo | 42 | 14.84(2.68) | Baselevel | -- | ||
| Overall | 0.001 | |||||
| Antibiotics | No | 193 | 13.78(3.57) | 0.42(-0.11 to 0.95) | 0.123 | |
| (<2 weeks) | Yes | 173 | 14.27(3.29) | |||
| Number of viruses | 0 | 138 | 13.51(4.09) | Baselevel | -- | |
| 1 | 153 | 14.08(3.42) | 0.42(-0.17 to 1.01) | 0.166 | ||
| >1 | 75 | 14.79(1.56) | 0.92(0.20 to 1.64) | 0.013 | ||
| Overall | 0.042 | |||||
| H. influenzae | Sex | Male | 180 | 12.96(4.61) | 0.21(-0.38 to 0.80) | 0.478 |
| Female | 186 | 13.24(4.48) | ||||
| Age category | <3mo | 36 | 10.26(7.10) | -1.71(-3.0 to -0.43) | 0.009 | |
| 3-6mo | 95 | 13.46(4.50) | -0.01(-1.04 to 1.01) | 0.981 | ||
| 6-9mo | 122 | 13.23(4.29) | -0.33(-1.32 to 0.66) | 0.513 | ||
| 9-12mo | 71 | 13.36(3.71) | -0.32(-1.39 to 0.76) | 0.565 | ||
| >12mo | 42 | 13.91(2.80) | Baselevel | -- | ||
| Overall | 0.041 | |||||
| Antibiotics | Yes | 193 | 12.82(4.96) | 0.22(-0.36 to 0.81) | 0.455 | |
| (<2 weeks) | No | 173 | 13.41(4.00) | |||
| Number of viruses | 0 | 138 | 12.35(5.13) | Baselevel | -- | |
| 1 | 153 | 13.34(4.35) | 0.65(-0.01 to 1.30) | 0.05 | ||
| >1 | 75 | 13.98(3.46) | 1.00(0.21 to 1.81) | 0.013 | ||
| Overall | 0.029 | |||||
| S. pneumoniae | Sex | Male | 180 | 12.22(3.96) | -0.41(-0.93 to 0.11) | 0.119 |
| Female | 186 | 11.39(4.80) | ||||
| Age category | <3mo | 36 | 9.83(6.03) | -1.13(-2.26 to -0.02) | 0.05 | |
| 3-6mo | 95 | 12.61(3.40) | 0.22(-0.68 to 1.13) | 0.627 | ||
| 6-9mo | 122 | 11.54(4.92) | -0.20(-1.08 to 0.67) | 0.647 | ||
| 9-12mo | 71 | 11.89(3.84) | -0.37(-1.32 to 0.58) | 0.448 | ||
| >12mo | 42 | 12.25(3.82) | Baselevel | -- | ||
| Overall | 0.083 | |||||
| Antibiotics | Yes | 193 | 11.84(4.25) | 0.05(-0.47 to 0.56) | 0.862 | |
| (<2 weeks) | No | 173 | 11.76(4.62) | |||
| Number of viruses | 0 | 138 | 11.30(4.96) | Baselevel | -- | |
| 1 | 153 | 12.13(3.99) | 0.34(-0.24 to 0.92) | 0.252 | ||
| >1 | 75 | 12.04(4.19) | 0.73(-0.35 to 1.07) | 0.319 | ||
| Overall | 0.444 | |||||
| Total Bacterial Load | Sex | Male | 180 | 17.46(1.65) | -0.06(-0.40 to 0.28) | 0.74 |
| Female | 186 | 17.40(1.65) | ||||
| Age category | <3mo | 36 | 17.52(2.12) | 0.27(-0.46 to 1.00) | 0.464 | |
| 3-6mo | 95 | 17.71(1.44) | 0.46(-0.14 to 1.06) | 0.131 | ||
| 6-9mo | 122 | 17.45(1.76) | 0.21(-0.37 to 0.79) | 0.48 | ||
| 9-12mo | 71 | 17.10(1.50) | -0.15(-0.78 to 0.48) | 0.646 | ||
| >12mo | 42 | 17.25(1.46) | Baselevel | -- | ||
| Overall | 0.185 | |||||
| Antibiotics | Yes | 193 | 17.36(1.61) | 0.14(-0.20 to 0.48) | 0.414 | |
| (<2 weeks) | No | 173 | 17.51(1.69) | |||
| Number of viruses | 0 | 138 | 17.42(1.68) | Baselevel | -- | |
| 1 | 153 | 17.42(1.70) | 0.01(-0.37 to 0.39) | 0.976 | ||
| >1 | 75 | 17.46(1.48) | 0.03(-0.44 to 0.49) | 0.901 | ||
| Overall | 0.992 | |||||
