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Sputum culture results of three Groups.
| Group | Infected cases (%) | Pathogenic bacterium (n) | Gram-positive bacterium (n) | Gram-negative bacterium (n) | Fungus (n) |
|---|---|---|---|---|---|
| A | 75(36.76) | 215 | 104 | 96 | 15 |
| B | 62(30.24)$$ | 189$ | 89$ | 85$ | 15 |
| C | 42(20.39)**,## | 78**,## | 35**,## | 36**,## | 7*,# |
**P<0.01, *P<0.05 represents the group C VS group A; ##P<0.01, #P<0.05 represents the group C VS group B; $P<0.05 represents the group B VS group A.
