Variable

Groups

 pain

P value

COR

95%CI

Yes (%)

No (%)

Age (years)

≤ 35

45 (9.2)

443 (89.8)

1

> 35

13 (8.4)

111 (93.5)

0.198

1.118

0.619-2.225

Term (weeks)

< 40

47 (9.3)

458 (90.7)

1

≥ 40

11 (10.3)

96 (89.7)

0.755

0.896

0.448-1.790

BSBP^* (mmhg)

< 120

31 (7.8)

369 (92.2)

1

≥ 120

27 (12.7)

185 (87.3)

0.045

0.576

0.334-0.993

Total dose^*

≤ 11

20 (17.5)

94 (82.5)

1

> 11

38 (7.6)

460 (92.4)

0.001

2.576

1.435-4624

BMI (Kg/m²)

< 25

15 (10.1)

133 (89.9)

1

25-29

30 (8.7)

314 (91.3)

0.618

1.180

0.615-2.226

≥ 30

13 (10.8)

107 (89.2)

0.853

0.928

0.423-2.035

Body weight (kg)

≤ 60

10 (12)

73 (88)

1

> 60

48 (9.1)

481 (90.9)

0.390

1.373

0.665-2.833

Sensory level block (dermatome)

6

7 (7.7)

84 (92.3)

1

7

3 (7.7)

36 (92.3)

1.000

1.00

0.245-4.087

8

48 (10)

107 (90)

0.502

0.753

0.330-1.722

Surgery duration (min)

≤ 45

43 (10.0)

392 (900)

1

> 45

15 (8.2)

162 (91.8)

0.480

1.248

0.675-2.308

Anaesthesia onset (min)

≤ 10

40 (9.6)

377 (89.4)

1

> 10

18 (9.2)

177 (90.8)

0.887

1.043

0.582-1.871

Site of puncture

L1-2

41 (9.3)

399 (90.7)

1

L2-3

18 (9.2)

155 (90.1)

0.830

0.937

0.517-1.699

Maternal height (cm)

≤ 160

33(7.9)

386 (92.1)

1

> 160

25 (13)

168 (87)

0.046

0.575

0.331-0.996