Group

LVEF (%)

LVED (m)

BNP (ng/L)

Observation group (n = 31)

48.21 ± 5.65

57.05 ± 5.25

275.33 ± 54.25

Control group (n = 31)

47.89 ± 5.82

56.34 ± 5.64

278.34 ± 55.64

t

1.041

1.146

1.384

P

0.102

0.113

0.135