Table 5 Factors associated with respiratory virus co-infection in children with MP pneumonia

Age at diagnosis of pneumonia, years

0.881 (0.800–0.970)

0.879 (0.798–0.969)

0.898 (0.809–0.997)

^†Duration of fever during illness ≥ 6 days

2.105 (1.074–4.123)

2.394 (1.172–4.892)

3.329 (1.540–7.196)

Total duration of hospitalization, days

1.083 (1.005–1.167)

1.070 (0.992–1.154)

1.060 (0.979–1.147)

Severity of pneumonia based on chest radiography findings at admission

 Mild

Ref.

Ref.

Ref.

 Moderate

2.050 (0.609-6.900)

2.746 (0.787–9.578)

2.485 (0.589–10.490)

 Severe

3.094 (0.820-11.672)

4.602 (1.154–18.353)

4.184 (0.875–20.011)

WBC, x 10³/µL

1.085 (1.008–1.168)

1.065 (0.988–1.148)

1.053 (0.974–1.139)

AST ≥ 44 IU/L^†

3.300 (1.577–6.906)

3.491 (1.616–7.543)

5.202 (2.211–12.238)

ALT ≥ 33 IU/L^†

2.749 (1.290–5.856)

3.325 (1.478–7.477)

4.756 (1.903–11.887)

LDH ≥ 805.3 IU/L^†

6.250 (2.878–13.574)

5.704 (2.602–12.504)

6.555 (2.772–15.503)

CRP, mg/dL

0.939 (0.866–1.019)

0.972 (0.898–1.051)

0.960 (0.885–1.042)

MP-specific IgM titer at the time of admission, index

1.129 (1.014–1.257)

1.109 (0.993–1.239)

1.121 (0.995–1.263)

Response to treatment

 Good response

Ref.

Ref.

Ref.

 Slow response

2.187 (1.041–4.599)

2.187 (1.041–4.599)

2.197 (0.931–5.185)

 No/poor response

4.354 (1.374–13.800)

4.354 (1.374–13.800)

4.410 (1.273–15.277)