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General information among BNP level groups
| Factors | Group 1 (n = 249) | Group 2 (n = 85) | Group 3 (n = 85) | χ2 | P value |
|---|---|---|---|---|---|
| Male n (%) | 112 (45.00) | 40 (47.10) | 44 (51.80) | 1.175 | 0.556 |
| Female n (%) | 137 (55.00) | 45 (52.90) | 41 (48.20) | ||
| Age/(year) | 66.73 ± 9.727 | 73.87 ± 8.446* | 72.84 ± 10.053* | 24.504 | <0.001 |
| BMI/(kg/m2) | 24.934 ± 3.608 | 24.939 ± 3.960 | 23.737 ± 3.062*∆ | 3.795 | 0.023 |
*compared with Group 1, P < 0.05; ∆compared with Group 2, P < 0.05
