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Table 1 Demographic data of 19 randomized patients (mean or number are noted, standard deviations are in parentheses) at Day 0 (D0)

From: Are paraspinous intramuscular injections of botulinum toxin a (BoNT-A) efficient in the treatment of chronic low-back pain? A randomised, double-blinded crossover trial

Patients

Botulinum toxin

Placebo

t-test (p)

Sample size

N = 9

N = 10

 

Men/Women

3/6

0/10

0.047

Age: mean (SD) in years

38.1 (5.94)

38.2 (10.27)

0.49

Spinal pain intensity: mean (SD) /100 mm

59.33 (15.71)

58.70 (15.89)

0.47

Radicular pain intensity: mean (SD) /100 mm

42.89 (26.98)

28.40 (27.16)

0.13

Pain intensity during last month: mean (SD) /100 mm

63.11 (25.70)

66.70 (24.50)

0.38

Pain intensity during last week: mean (SD) /100 mm

67.67 (22.37)

57.50 (25.63)

0.18

Quebec initial score mean (SD) /100 mm

52.56 (11.64)

51.70 (16.55)

0.45

Disability during last 8 months: mean (SD) /100 mm

58.22 (82.29)

151.6 (96.56)

0.018

Disability during last month: mean (SD) /100 mm

7.44 (12.99)

13.4 (14.55)

0.18

Quality of life at inclusion: mean (SD) /100 mm

76.56 (16.41)

65.00 (17.80)

0.08

Number of days with painkillers or anti-inflammatories: number (SD)

19.67 (13.44)

14.1 (12.57)

0.18

Paravertebral painful point pressure Right/Left/Bilateral

4/3/2

4/0/6

 

Stiffness: number

8

6

0.08

Tendency to cough: number

5

7

0.27

Instability: number

9

8

0.08

Schober’s test: centimeter (SD)

4.22 (1.30)

3.95 (1.77)

0.35

Hand-ground distance: centimeter (SD)

28.60 (13.60)

20.60 (15.60)

0.13

Spinal pain: mean (SD)

3.13 (1.46)

3.60 (1.84)

0.27

Paravertebral pain: number

2

5

0.33

Lasegue sign: number

0

0

 

Pseudo-Lasegue sign: mean (SD)

0.25 (0.46)

0.5 (0.53)

0.15

Disco-radicular conflict: number

0

1

0.17

MODIC L1-L2 0/1/2/3

9/0/0/0

9/0/1/0

0.17

MODIC L2-L3 0/1/2/3

9/0/0/0

9/0/1/0

0.17

MODIC L3-L4 0/1/2/3

9/0/0/0

9/0/1/0

0.17

MODIC L4-L5 0/1/2/3

9/0/0/0

9/0/0/1

0.17

MODIC L5-S1 0/1/2/3

5/3/1/0

4/3/2/1

0.15

HADAR L1-L2 0/1/2/3

8/1/0/0

8/2/0/0

0.31

HADAR L2-L3 0/1/2/3

6/3/0/0

7/3/0/0

0.44

HADAR L3-L4 0/1/2/3

4/5/0/0

7/1/2/0

0.33

HADAR L4-L5 0/1/2/3

1/6/2/0

3/4/3/0

0.37

HADAR L5-S1 0/1/2/3

1/4/4/0

0/4/6/0

0.18

Isokinetic maximum strength: n/m (SD)

115.33 (58.63)

114.44 (37.63)

0.49

Isokinetic endurance: n/m (SD)

89.11 (62.50)

77.33 (53.86)

0.34

Flexors/extensors ratio at 60°: % (SD)

123.63 (37.56)

119.36 (49.51)

0.42