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Table 1 Generalities and demographic baseline of the included studies

From: Predictors of success of pharmacological management in patients with chronic lower back pain: systematic review

Author, year

Journal

Follow-up (months)

Treatment

Patients (n)

Mean age

Women (%)

Symptoms duration (months)

Allan et al. [15]

Spine

13.0

Fentanyl

338

53.4

61.0

122.5

Morphine

342

54.7

38.0

127.0

Atkinson et al. [16]

Pain

2.0

Maprotiline

33

49.2

36.9

174.0

Paroxetine

34

   

Placebo

36

   

Atkinson et al. [17]

Pain

3.0

Gabapentin

55

57.8

18.9

206.0

Placebo

53

54.6

24.5

213.5

Baron et al. [18]

Pain Practice

2.8

Tapentadol

154

58.5

61.5

112.8

Tapentadol & Pregabalin

159

56.3

54.1

104.4

Bedaiwi et al. [4]

Arthritis Care & Research

1.0

Acetaminophen

25

37.2

44.0

 

Celecoxib

25

43.4

52.0

 

Birbara et al. [19]

J Pain

3.0

Etoricoxib

101

52.3

63.4

145.2

Etoricoxib

106

52.2

63.2

129.6

Placebo

107

51.0

55.1

128.4

Bråten et al. [20]

BMJ

12.0

Amoxicillin

89

44.7

60.0

36.0

Placebo

91

45.2

57.0

40.8

Buynak et al. [21]

Expert Opin. Pharmacother

 

Oxycodone

328

50.0

55.2

 

Tapentadol

318

49.4

61.0

 

Placebo

319

50.4

57.7

 

Chu et al. [22]

Pain

1.0

Morphine

69

44.0

36.2

 

Placebo

70

46.0

51.4

 

Coats et al. [23]

Clinical Therapeutics

1.0

Valdecoxib

148

48.6

54.7

139.2

Placebo

145

48.7

58.6

130.8

Gordon et al. [24]

Clin Ther

2.0

Buprenorphine

39

50.7

60.3

154.8

Placebo

39

   

Hale et al. [25]

J Pain

3.0

Oxymorphone Release

70

48.2

57.1

 

Placebo

72

46.0

33.3

 

Hwang et al. [26]

Pain Res and Man

1.9

Fentanyl

52

59.0

57.7

 

Gabapentin

56

58.2

53.6

 

Jamison et al. [27]

SPINE

4.0

Naproxen

12

42.6

57.1

79.1

Oxycodone

13

   

Oxycodone & Morphine

11

   

Kalita et al. [28]

J Neurological Sci

3.5

Amitriptyline

103

41.6

45.5

35.2

Pregabalin

97

42.0

 

35.9

Katz et al. [29]

Am J Pain

4.0

Bupropion

21

49.8

57.1

 

Placebo

23

51.4

39.1

 

Katz et al. [30]

Curr Med Res Opin

3.0

Oxymorphone

105

51.3

56.2

 

Placebo

100

48.1

50.0

 

Khoromi et al. [31]

J Pain

4.5

Topiramate & Placebo

21

   

Placebo & Topiramate

20

   

Klinger et al. [32]

PAIN

 

Opioid

12

50.0

18.75

119.33

Opioid & Conditioning

12

53.0

18.75

158.83

Placebo

12

50.8

18.75

165.67

Placebo & Conditioning

12

50.3

18.75

162.17

Konno et al. [33]

SPINE

3.5

Placebo

226

57.8

54.0

123.6

Duloxetine

230

60

50.0

117.6

Krebs et al. [34]

JAMA

12.0

Opioid

120

56.8

13.0

 

Non-Opioid group

120

59.7

13.0

 

Markman et al. [35]

Neurology

1.0

Pregabalin & diphenhydramine

14

71.1

29.0

 

Diphenhydramine & pregabalin

15

69.0

33.0

 

Muehlbacher et al. [36]

Clin J Pain

2.5

Topiramate

48

48.8

39.6

 

Placebo

48

48.7

35.4

 

Perrot et al. [37]

Clin Ther

0.3

Paracetamol & Tramadol

59

56.5

64.4

 

Tramadol

60

54.1

51.7

 

Pheasant et al. [38]

SPINE

 

Atropine

6

47.2

75.0

118.8

Amitriptyline

10

   

Pota et al. [39]

Pain Manage

1.5

Buprenorphine & pregabalin

22

55.0

50.0

15.0

Buprenorphine

22

   

Robertson et al. [40]

JAMA Neur

2.0

Pregabalin

10

57.0

39.0

 

Gabapentin

8

   

Romano et al. [41]

J Orthop Traumatol

3.0

Several protocols combining Pregabalin, Celecoxib and Placebo

36

53.0

55.6

 

Ruoff et al. [42]

Clinical Therapeutics

3.0

Tramadol & Acetaminophen

161

53.6

67.1

 

Placebo

157

54.1

59.2

 

Sakai et al. [43]

Eur Spine J

 

Pregabalin

30

72.0

30.0

 

Tramadol & Acetaminophen

30

72.6

36.7

 

Schiphorst Preuper et al. [44]

Eur Spine J

0.5

Tramadol & Acetaminophen

25

42.0

72.0

18.0

Placebo

25

44.0

64.0

24.0

Schliessbach et al. [45]

European J Pain

 

Clobazam

49

54.3

59.0

145.2

Placebo

    

Schliessbach et al. [46]

PLoS ONE

 

Imipramine

50

54.4

64.0

134.4

Placebo

    

Schliessbach et al. [47]

European J Pain

 

Oxycodone

50.0

   

Imipramine

50.0

   

Clobazam

49.0

   

Schukro et al. [48]

Anesthesiology

1.0

Duloxetine

25

57.9

51.0

18.0

Placebo

    

Shell et al. [49]

Am J Ther

1.0

Naproxen

43

   

Theramine

42

   

Naproxene & Theramine

44

   

Skljarevski et al. [50]

J Pain

3.0

Placebo

203

53.4

63.1

104.4

Duloxetine

198

54.9

59.6

99.6

Skljarevski et al. [51]

Pain Medicine

9.0

Duloxetine

83

51.2

65.1

104.4

Duloxetine & Placebo

98

52.2

63.3

120.0

Steiner et al. [52]

J Pain Symptom Management

3.0

Buprenorphine

257

48.8

52.0

 

Placebo

284

50.0

58.0

 

Takahashi et al. [53]

Fukushima J Med Sci

3.0

NSAID

15

53.3

53.3

5.92

Control group

18

57.6

55.6

7.63

Tetsunaga et al. [54]

J Orthop Sci

2.0

Tramadol

35

65.4

62.9

46.0

NSAID

35

62.3

62.9

54.2

Ãœberall et al. [55]

Curr Med Res Opin

1.0

Placebo

120

59.2

55.8

76.4

Flupirtine

119

58.6

68.9

69.2

Tramadol

116

57.6

61.2

71.7

Urquhart et al. [56]

JAMA Intern Med

6.0

Amitriptyline

72

53.5

39.0

159.6

Control group

74

56.0

38.0

182.4

Webster et al. [57]

J Pain

3.0

Placebo

101

48.7

61.4

 

Oxycodone

206

47.9

61.2

 

Oxytrex

206

47.8

61.7

 

Oxytrex

206

47.9

61.7

 

Yang et al. [58]

Yonsei Med J

0.5

Aceclofenac

50

57.6

76.0

50.0

Aceclofenac

50

56.9

76.0

91.6

Zaringhalam et al. [59]

Chinese Med

2.5

Baclofen

21

55.1

 

80.4

Acupuncture

21

54.2

 

85.2

Baclofen & Acupuncture

21

54.2

 

82.8

Control group

21

54.3

 

84.0

Zerbini et al. [60]

Curr Med Res Opin

1.0

Etoricoxib

224

51.7

71.9

99.6

Diclofenac

222

52.2

71.6

99.6