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Comparison of NYHA classifications of the two groups of patients 3 months after surgery (n, %)
| Group | Grade I | Grade II | Grade III | Grade IV |
|---|---|---|---|---|
| Control group (n=35) | 3 (8.57) | 7 (20.00) | 15 (42.86) | 10 (28.57) |
| KABP group (n=41) | 18 (43.90) | 16 (39.02) | 5 (12.20) | 2 (4.88) |
| χ2 | 24.269 | |||
| P | 0.000 | |||
Note: KABP: knowledge, attitude, belief and practice.
