Table 1 Comparison of age and sagittal parameters between observation group and control group

Sex

30 males; 57 females

28 males; 52 females

–

–

Age (year)

75.45 ± 3.74

74.52 ± 3.64

u = 2930.500

> 0.05

SVA (mm)

50.47 ± 36.53

20.13 ± 37.83

t = 5.272

< 0.01

TK (°)

29.83 ± 12.30

32.75 ± 8.73

t = -1.782

> 0.05

LL (°)

31.98 ± 14.60

43.48 ± 14.09

u = 1907.500

< 0.01

PI (°)

48.21 ± 11.84

41.94 ± 8.87

u = 2403.500

< 0.01

SS (°)

25.35 ± 11.59

30.19 ± 7.83

u = 2347.500

< 0.01

PT (°)

22.24 ± 8.90

11.90 ± 6.66

u = 1344.500

< 0.01