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Table 2 Study characteristics

From: Minimal clinically important change of knee flexion in people with knee osteoarthritis after non-surgical interventions using a meta-analytical approach

Study

Knee OA diagnosis, KL

Treatment arms

(Treatment category)

Duration

(Assessment time point)

Participants

Mean Age (SD)

Mean BMI (SD)

Outcome measures

Abolhasani et al., 2019 [47]

ACR

KL: II to III

G1: Kinesiotape

(Non-pharmacological)

3 days

(3 days)

= 14

57.5 (6.7); 28.4 (5.3)

Knee flexion- Standard goniometry

Pain (VAS)- Pain intensity

G2: Sham-kinesiotape

(Non-pharmacological)

= 13

57.2 (8.8); 27.6(4.8)

Alfredo et al., 2012 [48]

ACR

II to IV

G1: Laser therapy with exercises

(Non-pharmacological)

3 weeks

(3 weeks)

= 20

61.2 (7.5); 30.2 (4.1)

Knee flexion- Universal goniometer

Pain (VAS)-Pain

WOMAC- Pain, Function, Stiffness, Total

G2: Placebo laser therapy with exercises

(Non-pharmacological)

= 22

62.3 (6.9); 29.2 (5)

Alfredo et al., 2020 [49]

ACR

II to IV

G1: Continuous ultrasound therapy at the 1st month + exercises at the 2nd month

(Non-pharmacological)

8 weeks

(8 weeks)

= 20

64.4 (6.2); 31 (3.4)

Knee flexion- Universal goniometer

Pain (VAS)- ADL, rest

WOMAC- Pain, Function, Stiffness, Total

G2: Pulsed ultrasound therapy at the 1st month+ exercises at the 2nd month

(Non-pharmacological)

= 20

63.9 (4.5); 27.8 (3.7)

G3: Continuous ultrasound therapy at the 1st month + Continuous ultrasound therapy with exercises

(Non-pharmacological)

n = 20

65.8 (6); 26.5 (6.6)

G4: Pulsed ultrasound therapy at the 1st month + Pulsed ultrasound therapy with exercises

(Non-pharmacological)

n = 20

66.7 (6.6); 27.9 (4.2)

G5: Exercises

(Non-pharmacological)

= 20

62.7 (8.5); 31.1 (3.2)

Alkhawajah & Alshami, 2019 [25]

ACR

II to IV

G1: Mobilisation with movement

(Non-pharmacological)

1 session

(immediately)

= 20

56.5 (7.6); 32.6 (7.8)

Knee flexion- Goniometer

Pain (VAS)- Current pain intensity

WOMAC- Function, Stiffness, Total

G2: Sham Mobilisation with movement, active passive movement 10 times, 3 sets

(Non-pharmacological)

 

n = 20

56.6 (8.5); 33.3 (6.1)

Altınbilek et al., 2018 [50]

ACR

II to III

G1: Osteopathic manipulative treatment

(Non-pharmacological)

2 Weeks

(2 Weeks)

n = 44

53.9 (8.2)

32.3 (5.2)

Knee flexion- Standard goniometer

WOMAC- Pain, Function, Stiffness

G2: Exercise group

(Non-pharmacological)

n = 41

55.6 (8.8); 30.9 (5.9)

Alpay and Sahin 2022 [51]

Radiographic

II to III

G1: Basic body awareness therapy+ Home exercise program

(Non-pharmacological)

6 Weeks

(6 Weeks)

= 20

53.7 (5.7), 31.8 (4.9)

Knee flexion- Standard goniometer

Pain (VAS)-Pain intensity

WOMAC-total

G2: Home exercise program

(Non-pharmacological)

= 20

56.3 (6.3), 32.1 (5.9)

Arslan and Kul, 2022 [52]

ACR

II to III

G1: Shockwave treatment

(Non-pharmacological)

3 Weeks

(10 days)

= 26

57.4 (8.3); 34.1 (5.0)

Knee flexion- Standard goniometer

Pain (VAS)- Pain

WOMAC- Pain, Function, Stiffness, Total

G2: Conventional physical therapy

(Non-pharmacological)

= 26

57.4 (8.3); 34.1 (5.0)

Ashraff et al., 2022a [53]

Radiographic

(0 to IV)

G1: Low level laser therapy combined with conventional exercises

3 weeks

(3 weeks)

= 22

52.8 (3.0); 29.3 (1.4)

Knee flexion- Goniometer

WOMAC-total

Pain (NPRS)- Pain

G2: Conventional exercises only.

= 22

53.0 (3.3); 29.5 (1.6)

Askari et al., 2019 [54]

ACR

I to III

G1: Sesame oil massage therapy

(Non-pharmacological)

4 weeks

(4 weeks)

= 47

57.5 (12.5); 28.7 (3.8)

Knee flexion- Standard goniometer

Pain (VAS)- joint pain

WOMAC- Pain, Function, Stiffness, Total

G2: Diclofenac sodium gel therapy

(Pharmacological)

= 47

57.5 (9.1); 27.8 (4.5)

Assar et al., 2020 [55]

ACR

II to IV

G1: Total resistance exercises

(Non-pharmacological)

8 weeks

(8 weeks)

= 12

55.9 (8.6); 29.8 (7.2)

Knee flexion- Bubble inclinometer device

Pain (VAS)- Pain at daily activities

WOMAC- Stiffness

G2: Aquatic exercises

(Non-pharmacological)

n = 12

57.5 (6.9); 28.5 (3.7)

G3: Control group: rheumatologic advice only

(No treatment)

= 12

63.8 (7.5); 23.1 (11.6)

Aydoğdu et al., 2017 [56]

ACR

II to III

G1: Kinesiotape + UST + TENS + Electrotherapy + Cold pack therapy

(Non-pharmacological)

3 weeks

(3 weeks)

= 28

52.5 (9.7); 31.2 (5.1)

Knee flexion- Universal goniometer

Pain (VAS)- Pain level

KOOS- Symptoms, Pain, ADL, Sports and recreation, QOL

G2: Control group: UST + TENS + Electrotherapy + Cold pack therapy

(Non-pharmacological)

= 26,

51.2 (8.9); 31.5 (5.7)

Babaskin et al., 2019 [57]

ACR

I to II

G1: Phyto complex electrophoresis + drug therapy

(Mixed)

10 days

(10 days)

= 36

NR, NR

Knee flexion- Goniometer

WOMAC- Pain, Function, Stiffness

G2: Amplipulse therapy + drug therapy

(Mixed)

= 36

NR, NR

G3: Drug therapy: Slow Acting Drugs for Osteoarthritis

(Pharmacological)

= 36

NR, NR

Benedetti et al., 2017 [58]

ACR

NR

G1: Local Muscle Vibration therapy

(non-pharmacological)

2 weeks

(2 weeks)

= 15

61.8 (5.8); 26.1 (2.9)

Knee flexion- Instrument- NR

Pain (VAS)-Pain

WOMAC-Total

G2: Neuromuscular Electrical Stimulation (Non-pharmacological)

= 15

55.7 (9.1); 26 (2.8)

Bhore and Shindea, 2023 [59]

Radiographic I to II

G1: Multi‐Component Exercise Program

(Non-pharmacological)

6 weeks

(6 weeks)

n = 60

NR; NR

Knee flexion- Goniometer

WOMAC- Total

G2: Conventional Group (electrotherapy modalities like the hot moist pack, interferential therapy, ultrasonic therapy, active ROM exercises and progressive resistance exercises).

(Non-pharmacological)

= 60

NR; NR

Peréz Busquier et al., 1997 [60]

WHO

NR

G1: Aceclofenac tablets

(Pharmacological)

2 months

(2 months)

n = 123

59.3 (8.9); nr

Knee flexion- Goniometer

Pain (VAS)-Pain

G2: Piroxicam tablets

(Pharmacological)

n = 117

59.7 (7.4); nr

Coleman et al., 2012 [61]

Clinical

NR

G1: Knee self-management program

(Non-pharmacological)

6 weeks

(8 weeks)

n = 71

65 (7.9); nr

Knee flexion- Goniometer

Pain (VAS)-Pain

WOMAC- Pain, Function, Stiffness, Total

SF36-Physical function, Role physical, Body pain, General health, Vitality, Social function, Role emotional, Mental health

Pain (NPRS)- Pain

G2: Control group: waiting period

(No treatment)

n = 75

65 (8.7); nr

Costa et al., 2020 [62]

Radiographic

I to III

G1: UCII (Undenatured Oral type II Collagen) and physiotherapy (Mixed)

1 month

(1 month)

= 20

55.5 (8.8); 30.2 (4.9)

Knee flexion- Goniometer

Pain (VAS)- Pain

WOMAC- Total

G2: Placebo UCII and physiotherapy (Mixed)

n = 20

57.4 (11.4); 30.3 (5.7)

G3: Physiotherapy (Non-pharmacological)

= 20

59.6 (8.2); 30.4 (5.8)

Deniz et al., 2009 [63]

ACR

II to IV

G1: Continuous diclofenac gel phonophoresis

(Mixed)

10 days

(10 days)

n = 20

56.4 (6.5); 31.2 (4.5)

Knee flexion- Instrument- NR

Pain (VAS)- Pain at rest, in activity

WOMAC- Pain, Function, Stiffness

G2: Pulsed diclofenac gel phonophoresis

(Mixed)

n = 20

57.1 (6.6); 30.1 (4.3)

G3: Diclofenac gel sham phonophoresis

(Mixed)

n = 20

54.5 (6.8); 30.6 (4.1)

G4: Acoustic gel sham phonophoresis

(Non-pharmacological)

n = 20

56.3 (6.7); 29.1 (3.8)

Dogan et al; 2022 [64]

ACR

>II

G1: Kinesio taping

(Non-pharmacological)

7 weeks

(7 weeks)

n = 27

56.9 (6.9); 32.8 (5.8)

Knee flexion- Instrument- NR

Pain (VAS)- Pain at rest, in activity

G2: Sham kinesio taping

(Non-pharmacological)

n = 30

55.7 (6.9); 30.8 (5.4)

Donec & Kubilius, 2020a [65]

Radiographic

I to III

G1: Kinesiotaping

(Non-pharmacological)

4 weeks

(4 weeks)

n = 81 (123 knees

68.7 (9.9); 30.5 (5.3)

Knee flexion- Goniometer

KOOS- Symptoms, Pain, ADL, Sports and recreation, QOL

G2: Non-specific kinesiotaping

(Non-pharmacological)

= 76 (114 knees)

70.6 (8.3); 30.7 (5.2)

Draper et al., 2018 [66]

Radiographic I to II

G1: Low intensity long duration ultrasound therapy

(Non-pharmacological)

6 weeks

(6 weeks)

= 51

53.6 (8.9); 34.9 (8.9)

Knee flexion- Inclinometer

WOMAC- Pain, Function, Stiffness, Total

Pain (NPRS)- Pain

G2: Placebo ultrasound therapy

(Non-pharmacological)

 

= 31

51 (9); 34.5 (8.3)

Dwyer et al., 2015 [67]

ACR

0-III

G1: Mobilisation with movement

(Non-pharmacological)

4 weeks

(4 weeks)

= 26

63.5 (10.9); 28.6 (5.2)

Knee flexion- Digital Inclinometer

WOMAC- Pain, Function, Stiffness, Total

G2: Rehabilitation program

(Non-pharmacological)

= 26

60.9 (10.3); 30.8 (6.4)

G3: Mobilisation with movement plus rehabilitation

(Non-pharmacological)

= 26

62.2 (11.8); 30.6 (7.6)

Eftekharsadat et al., 2020 [68]

ACR

II to III

G1: Shock wave therapy

(Non-pharmacological)

3 weeks

(3 weeks)

= 25

58 (6); NR

Knee flexion- Goniometer

Pain (VAS)- Pain intensity at rest

WOMAC- Pain, Function, Stiffness, Total

G2: Physiotherapy

(Non-pharmacological)

= 25

55.8 (6.1); NR

G3: Exercise therapy

(Non-pharmacological)

= 25

58.2 (7.2); NR

Elgendy et al., 2020 [69]

Clinical and raiographic

II to III

G1: Shock wave therapy

(Non-pharmacological)

4 weeks

(4 weeks)

= 15

48.7 (8.6); 31.3 (2.3)

Knee flexion- Laser Goniometer

Pain (VAS)- Pain intensity

WOMAC- Total

G2: Platelet rich plasma injection (Pharmacological)

= 15

49.2 (9.2); 31.5 (2.0)

G3: Conventional physiotherapy (Stretching and strengthening+UST+hot pack)

(Non-pharmacological)

= 15

55.1 (6.7); 30.8 (2.5)

ElGendy et al., 2022 [70]

Radiographic

II to III

G1: Rectus femoris stretching exercises together with stretching exercises of the calf, hamstring and iliotibial band, strength exercises for the quadriceps, gluteus medius, gluteus maximus and calf muscles

(Non-pharmacological)

4 weeks

(4 weeks)

= 30

53.6 (6.0); 32.1 (0.8)

Knee flexion- Universal goniometer

Pain (VAS)- Pain intensity

WOMAC- Total

G2: Exercises mentioned for G1 except rectus femoris stretching.

(Non-pharmacological)

= 30

53.1 (5.9); 32.1 (0.7)

Fakhari et al., 2021 [71]

Radiographic

II to III

G1: Ozone intraarticular injection

(Non-pharmacological)

4 weeks

(4 weeks)

= 30,

57.7 (9.4); NR

Knee flexion- Goniometer

Pain (VAS)- Pain

WOMAC- Total

G2: Low level lazer therapy

(Non-pharmacological)

= 30

53.3 (9.4); NR

Sousa Filho et al., 2017 [72]

Clinically

NR

G1: Ultrasound therapy

(Non-pharmacological)

5 weeks

(5 weeks)

= 30,

61.8 (12.5); 29 (2.4)

Knee flexion- Goniometer

Pain (VAS)- Pain intensity

G2: Ultrasound and capaiba oil massage

(Mixed)

n = 30

61.1 (8.2); 29.4 (7.2)

G3: Capaiba oil massage

(Pharmacological)

= 30

61.4 (9.9); 34.5 (6.2)

Fish et al., 2008 [73]

Clinically and radiographic

NR

G1: Capasaicin massage

(Pharmacological)

3 weeks

(3 weeks)

n = 20

62 (SD); NR

Knee flexion- Goniometer

Pain (NPRS)- Pain

WOMAC-Total

G2: Maitland mobilisation

(Non-pharmacological)

= 20

60 (SD); NR

G3: Maitland mobilisation with capasaicin massage

(Mixed)

n = 20

62 (SD); NR

Forogh et al., 2016 [74]

ACR

II to III

G1: Intraarticular platelet rich plasma (Pharmacological)

1 session

(2 months)

n = 24

59.1 (7.0); 28.9 (2.8)

Knee flexion- Goniometer

Pain (VAS)- Pain intensity

KOOS- Pain, Symptoms, ADL, QOL, Sports

G2: Intraarticular corticosteroid (Pharmacological)

n = 24

61.1 (6.7); 29.2 (3.4)

Fung, 2021 [75]

Arden and Nevitt

NR

G1: Passive mobilisation with movement with a machine (PANDA)

(Non-pharmacological)

2 weeks

(2 weeks)

= 34

75.1 (8); 22 (2)

Knee flexion- Electronic Goniometer

Pain (VAS)- Pain intensity

WOMAC- Pain, Function, Stiffness, Total

G2: Control group: Sham PANDA and exercise

(Non-pharmacological)

n = 34

76.1 (7.5); 22.5 (2.2)

Gungen et al., 2012 [76]

ACR

III to IV

G1: Hot pack therapy

(Non-pharmacological)

2 weeks

(2 weeks)

= 21

61.9 (6.7); 27.6 (2.4)

Knee flexion- Goniometer

Pain (VAS)- Pain at rest, at night, activity

WOMAC- Pain, Function, Stiffness

G2: Mud pack therapy

(Non-pharmacological)

= 23

65 (7.1); 28 (2.8)

Gur et al., 2003 [77]

ACR

II to IV

G1: Acute laser therapy: 5 minutes/3J+exercises

(Non-pharmacological)

14 weeks

(12 weeks)

= 30

58.6 (5.9); 31.2 (3.8)

Flexion- Goniometer

Pain (VAS)- Pain at rest, at movement, at flexion

WOMAC- Total

G2: Acute laser therapy: 3 minutes/2J+exercises

(Non-pharmacological)

n = 30

59.8 (8.0); 28.5 (3.0)

G3: Placebo laser therapy+exercises

(Non-pharmacological)

n = 30

60.5 (6.9); 30.3 (3.1)

Gurudut & Jaiswal, 2022a [78]

Radiographic

III to IV

G1: Progressive muscle relaxation

(Non-pharmacological)

2 weeks

(2 weeks)

n = 5

55.8 (6.3); 33.3 (4.9)

Flexion- Universal goniometer

WOMAC- Total

G2: Yoga graded motor imagery

(Non-pharmacological)

n = 6

45.8 (8.4); 37.7 (6.3)

Hewlings et al., 2019 [79]

ACR

NR

G1: Hydroselate dietary supplement (Pharmacological)

12 weeks

(4 weeks)

n = 44

NR; NR

Standard goniometer (JAMA)

WOMAC- Pain, Function, Stiffness

G2: Placebo group: same excipients but without the active study product (Pharmacological)

n = 44

NR; NR

Ho et al., 2021 [80]

radiographic

IV

G1: Thermal gun

(Non-pharmacological)

4 weeks

(4 weeks)

n = 38

68 (6.2); NR

Flexion- Goniometer

Pain (VAS)- Pain

WOMAC- Pain, Function, Stiffness, Total

G2: Heat pack treatment

(Non-pharmacological)

= 38

66.6 (7.4); NR

Kaya Mutlu et al., 2017 [81]

ACR

II to IV

G1: Kinesiotaping

(Non-pharmacological)

3 sessions

(3sessions)

n = 20

54.3 (6); 30.7 (3.8)

Flexion- Digital goniometer

Pain (VAS)- Pain intensity-at rest, activity, night

WOMAC- Total

G2: Placebo kinesiotaping

(Non-pharmacological)

= 19

57.1 (6.3); 31.3 (6.2)

Kaya Mutlu et al., 2018 [24]

ACR

II to III

G1: Mobilisation with movement

(Non-pharmacological)

4 weeks

(4 weeks)

n = 21

54.2 (7.3); 30.8 (5.0)

Flexion- Digital goniometer

Pain (VAS)- Pain intensity-at rest, activity, night

WOMAC- Pain, Function, Stiffness, Total

G2: Passive joint mobilisation

(Non-pharmacological)

n = 21

56.3 (6.6); 30.7 (4.3)

G3: Electrotherapy

(Non-pharmacological)

n = 22

57.8 6.2); 32.6 (5.7)

Khademi-Kalantari et al., 2014 [82]

Clinical and radiographic

III to IV

G1: Physiotherapy + knee distraction

(Non-pharmacological)

2 weeks

(2 weeks)

n = 20

61.2 (8.6); 32.3 (5.6)

Flexion- Goniometer

Pain (VAS)- Pain

KOOS- Pain, Symptoms, Activity, Sports and recreation, QOL

G2: Physiotherapy

(Non-pharmacological)

n = 20

61.3 (6.8); 30.8 (6.1)

Kus et al., 2023 [83]

ACR

II to III

G1: Sensory-motor training

(Non-pharmacological)

8 weeks

(8 weeks)

n = 24

58.5 (7.1); 30.5 (3.9)

Flexion- Digital goniometer

Pain (VAS)- Pain-rest, activity, night

WOMAC- Total

G2: Resistance training

(Non-pharmacological)

n = 24

60.0 (6.1); 29.6 (3.8)

Lizis et al., 2017 [84]

ACR

NR

G1: Extracorporeal shockwave therapy

(Non-pharmacological)

5 weeks

(5 weeks)

n = 20

63.5 (8); 24.9 (1.9)

Flexion- Goniometer

WOMAC- Pain, Function, Stiffness, Total

G2: Kinesiotherapy

(Non-pharmacological)

n = 20

65.0 (8.4); 24.1 (1.5)

Lizis et al., 2019 [85]

ACR

NR

G1: Manual therapy with cryotherapy

(Non-pharmacological)

5 weeks

(5 weeks)

n = 64

62.3 (9.7); 24.2 (1.8)

Flexion- Goniometer

Pain (VAS)- Current level- pain

WOMAC- Pain, Function, Stiffness

G2: Kinesiotherapy with cryotherapy

(Non-pharmacological)

n = 64

62 (11.4); 23.6 (1.7)

Lun et al., 2015 [86]

Clinical and radiographic

NR

G1: Hip strengthening exercises

(Non-pharmacological)

12 weeks

(12 weeks)

n = 37

63.4 (9.6); 29.3 (4.2)

Flexion- Goniometer

WOMAC- Pain, Function, Stiffness

KOOS- Pain, Symptoms, ADL, QOL, Sports recreation

G2: Leg strengthening exercises

(Non-pharmacological)

n = 34

61.38 (7.7); 30.8 (6.3)

Ma et al., 2023 [87]

Radiographic

(II to IV)

G1: Dry needling latent and active myofascial trigger point with the stretching group

(Non-pharmacological)

6 weeks

(6 weeks)

n = 42

74.6 (6.4); 26.1 (3.4)

Flexion- Goniometer

WOMAC- Pain, Function, Stiffness

Pain (NPRS)-Pain severity

G2: Oral diclofenac with the stretching group

(Mixed)

n = 35

75.4 (5.8); 24.5 (3.3)

Mendes et al., 2019 [88]

ACR

II to III

G1: Botulinum toxin intraarticular injection (Pharmacological)

1 session

(4 weeks)

n = 35

62.5 (6.8); 30.4 (4.8)

Flexion- Instrument- NR

VAS(Pain)- Rest, activity

WOMAC- Pain, Function, Stiffness, Total

G2: Triaminolone hexacetonide intraarticular injection

(Pharmacological)

n = 35

65.5 (6.9); 32.7 (5.5)

G3: Saline solution intraarticuar injection (Pharmacological)

n = 35

64.6 (6.7); 30.5 (5.3)

Moezy et al., 2021 [89]

ACR

II to III

G1: Exercise to activate vastus medialis

(Non-pharmacological)

4 weeks

(4 weeks)

n = 33

55.5 (4.3); 26.8 (2.3)

Flexion- Goniometer

VAS(Pain)- Pain severity

 

G2: Conventional exercise (Strengthening, stretching non-specific)

(Non-pharmacological)

n = 32

56.6 (6.3); 25.8 (2.2)

Mohamed and Alatawi, 2022 [90]

Clinical and radiographic

NR

G1: Kinesio taping plus conventional physical therapy

(Non-pharmacological)

6 weeks

(6 weeks)

n = 20

60.6 (9.4); 26.7 (2.9)

Flexion- Goniometer

Pain (NPRS)- Pain intensity

WOMAC- Pain, Function, Stiffness

G2: Conventional physical therapy

(Non-pharmacological)

n = 20

63.4 (8.0); 27.7 (2.4)

Nam et al., 2014a [91]

Clinical

III to IV

G1: Exercise on unstable surface

(Non-pharmacological)

6 weeks

(6 weeks)

n = 15

64.9 (6.8); NR

Flexion- Standard goniometer

WOMAC- Total

G2: Exercise on stable surface

(Non-pharmacological)

n = 15

63.7 (5.6); NR

Nazari et al., 2019 [92]

ACR

II to III

G1: High intensity laser therapy combination with exercises

(Non-pharmacological)

4 weeks

(4 weeks)

n = 30

61.5 (3.9); 27.7 (1.4)

Flexion- Instrument- NR

Pain (VAS)- Pain intensity

WOMAC- Pain, Function, Stiffness, Total

G2: Conventional physiotherapy (TENS+UST) in combination with exercise

(Non-pharmacological)

n = 30

62.4 (3.1); 27.2 (1.6)

G3: Exercise alone

(Non-pharmacological)

n = 30

62.2 (3.9); 27.5 (1.8)

Nidup et al., 2020a [93]

Clinical

I to II

G1: Rsta-byugs application

(Pharmacological)

1 week

(1 week)

n = 31

62.8 (7.2); 62.6 (8.4)

Flexion- Goniometer

KOOS- Pain, Symptoms, ADL, QOL, Sports recreation

G2: Diclofenac gel application

(Pharmacological)

n = 31

25.1 (3.9); 25.7 (4.2)

Oktayoglu et al., 2014 [94]

ACR

II to IV

G1: Phonophoresis (diclofenac sodium)

(Mixed)

10 sessions

(15 day)

n = 20

54.6 (8.7); 29.7 (4.2)

Flexion- Goniometer

Pain (VAS)- Walking, rest, flexion

WOMAC- Pain, Function, Stiffness, Total

G2: Conventional Ultrasound

(Non-pharmacological)

n = 20

55.1 (10.1); 30.2 (3.3)

Parfitt & Parfitt, 2006 [95]

Clinical

NR

G1: Intraarticular corticosteroid injection+ home exercise

(Mixed)

8 weeks

(8 weeks)

n = 8

76.13 (7.74); NR

Flexion- Goniometer

Pain (VAS)- Pain at rest, after walking, at night, worst pain

WOMAC- Pain, Function, Stiffness, Total

G2: Intraarticular corticosteroid injection (Pharmacological)

n = 5

67.2 (6.01); NR

Parmigiani et al., 2010a [96]

ACR

II to III

G1: Joint lavage followed by intra-articular injection with triamcinolone hexacetonide

(Pharmacological)

1 session

(1 session)

n = 30

66.2 (9.07); 31.1 (5.1)

Flexion- Goniometer

WOMAC- Pain

G2: Intra-articular injection with triamcinolone hexacetonide

(Pharmacological)

n = 30

61.2 (7.3); 32.4 (6)

Petrella & Petrella, 2006 [97]

Radiographic

I to III

G1: Hyaluronic acid intra articular injection (Pharmacological)

3 weeks

(6 weeks)

n = 51

63.9 (9.3); NR

Flexion- Goniometer

Pain (VAS)- Pain-walking, stepping

WOMAC- Pain, Function, Stiffness

SF36- Physical function, Role physical, Body pain, General health, Vitality, Social function, Role emotional, Mental health

G2: Placebo/ saline injection

(Pharmacological)

n = 54

62.4 (10.3); NR

Pinkaew et al., 2019 [98]

ACR

NR

G1: Ultrasound therapy

(Non-pharmacological)

10 days

(10 days)

= 20

64.3 (9.7); 22.6 (8.6)

Flexion- Plastic goniometer

Pain (VAS)- Pain

WOMAC- Severity of pain

SF36- Total

G2: Phonophoresis of phyllanthus amarus

(Mixed)

= 20

65.2 (8.3); 23.6 (5.2)

Prasad et al., 2023 [99]

ACR

II

G1: NXT15906F supplement (herbal formulation pre- pared using T. indica seeds and C. longa rhizome extracts)

(Pharmacological)

30 days

(30 days)

n = 50

53.1 (9.1); 25.2 (1.4)

Flexion- Instrument- NR

WOMAC- Pain, Function, Stiffness, Total

G2: Blend of C. longa and Boswellia serrata extracts supplement

(Pharmacological)

n = 50

51.0 (8.1); 25.3 (1.5)

G3: Placebo

(No treatment)

n = 50

53.4 (9.3); 25.6 (1.3)

Rahlf et al., 2019 [100]

Clinical and radiographic

NR

G1: Kinesiotape

(Non-pharmacological)

3 days

(3 days)

= 47

64.7 (7.3); NR

Flexion- Double armed goniometer

WOMAC- Pain, Function, Stiffness

G2: Sham tape

(Non-pharmacological)

= 47

65.3 (6); NR

G3: Control group/No treatment

(No treatment)

= 47

65.4 (7.6); NR

Saleem et al., 2022a [101]

Radiographic

II to IIII

G1: Pilate exercises

(Non-pharmacological)

8 weeks

(8 weeks)

= 22

57.6 (6.3); 25.8 (4.2)

Flexion- Goniometer

WOMAC- total

Pain (NPRS)- Pain

G2: Isometric exercises

(Non-pharmacological)

= 22

55.7 (7.3); 26.9 (4.3)

Samaan et al., 2022 [102]

ACR

II to IIII

G1: High-intensity laser therapy plus exercise therapy

(Non-pharmacological)

2 weeks

(2 weeks)

n = 20

55.4 (6.3); 29.0 (2.2)

Flexion- Electrogoniometer

Pain (VAS)- Pain intensity

WOMAC- Total

G2: Low-intensity pulsed ultrasound plus exercise therapy

(Non-pharmacological)

= 20

55.2 (4.8); 29.1 (2.4)

G3: Control group/ exercise therapy

(Non-pharmacological)

n = 20

57.0 (6.4); 29.8 (2.1)

Sari et al., 2019 [103]

ACR

II to III

G1: Intermittent pneumatic compression, ultrasound therapy, TENS, Exercise

(Non-pharmacological)

4 weeks

(4 weeks)

n = 45

50.8 (9.5); 28.9 (5.8)

Flexion- Universal goniometer

Pain (VAS)- Pain intensity

WOMAC- Pain, Function, Stiffness

G2: Cold pack, ultrasound therapy, TENS, Exercise

(Non-pharmacological)

n = 36

52.3 (7); 28.7 (5.7)

Shin et al., 2017 [104]

Clinical and radiographic

NR

G1: Theracumin intake

(Pharmacological)

8 weeks

(8 weeks)

n = 13

44.8 (5.4); NR

Flexion- Goniometer

Pain (VAS)-Pain

WOMAC- Pain, Function, Stiffness, Total

G2: Theracumin intake combined with exercise

(Mixed)

= 12

40.6 (7.7); NR

Song et al., 2020a [105]

Medical

I to IIII

G1: PNF

(Non-pharmacological)

12 weeks

(12 weeks)

n = 13

68.5 (4.3); NR

Flexion- Goniometer

WOMAC- Pain

G2: Control- No treatment

(No treatment)

= 16

67.4 (3.4); NR

Sterzi et al., 2016 [106]

ACR

II to III

G1: Dietary supplement plus exercise

(Mixed)

8 weeks

(8 weeks)

= 23

71.3 (8.8); 34.8 (6.4)

Flexion- Instrument- NR

Pain (VAS)- Pain at rest, motion

WOMAC- Total

G2: Placebo tablet plus exercise

(Mixed)

n = 27

71 (8); 34.3 (7.5)

Suen et al., 2016a [107]

ACR

NR

G1: Placebo laser auriculotherapy and magneto auricular therapy

(Non-pharmacological)

6 weeks

(6 weeks)

n = 11

73 (6.31); NR

Flexion- Standard goniometer

Pain (NPRS)- Maximum pain in last 3 days

G2: Laser auriculotherapy and Placebo magneto auricular therapy

(Non-pharmacological)

n = 10

72.8 (6.68); NR

G3: Laser auriculotherapy plus magneto auricular therapy

(Non-pharmacological)

n = 13

71.62 (7.75); NR

G4: Placebo therapy: Laser switched off mode

(Non-pharmacological

= 9

73.86 (8.53)

NR

Tammachote et al., 2016 [108]

ACR

I to IV

G1: Hyaluronic acid injection

(Pharmacological)

1 session

(2 weeks)

n = 50

62.6 (NR); 26.3 (NR)

Flexion- Goniometer

Pain (VAS)- Pain

G2: Triaminolone acetonide injection (Pharmacological)

n = 49

61 (NR); 25.8 (NR)

Tascιoglu & Öner, 2003 [109]

ACR

II to III

G1: Sodium hyaluronate intraarticular injection

(Pharmacological)

3 weeks

(3 weeks)

n = 30

57.4 (6.5); 32.7 (4.1)

Flexion- Instrument- NR

Pain (VAS)- Pain at rest, weight bearing, walking

G2: 6-methyl predinsolone acetate intraarticular injection

(Pharmacological)

n = 30

60.1 (8.7); 33.3 (4.5)

Tascioglu et al., 2010 [110]

ACR

II to III

G1: Continuous Ultrasound therapy

(Non-pharmacological)

2 weeks

(2 weeks)

n = 27

59.7 (2.6); 30 (4)

Flexion- Goniometer

Pain (VAS)- Knee pain severity

WOMAC- total

G2: Pulsed Ultrasound therapy

(Non-pharmacological)

n = 28

61.6 (3.7); 30.8 (3.8)

G3: Placebo Ultrasound therapy

(Non-pharmacological)

n = 27

60 (2.8); 28.7 (4)

Terzi & Altin, 2017 [111]

Radiographic

II

G1: Quadriceps strengthening, ultrasound, TENS, hot pack plus short-wave diathermy

(Non-pharmacological)

6 weeks

(6 weeks)

n = 39

59.5 (8.6); 29.5 (5.4)

Flexion- Goniometer

Pain (VAS)- Pain intensity

G2: Quadriceps strengthening+SWD+TENS+hot pack (Non-pharmacological)

n = 38

58.6 (7); 29.4 (5.4)

G3: Control group: Quadriceps strengthening only

(Non-pharmacological)

n = 30

58.1 (7.7); 28.3 (6.0)

Torri et al., 1994 [112]

WHO

NR

G1: Aceclofenac tablets

(Pharmacological)

3 months

(3 months)

= 103

57.8 (10.1); NR

Pain- Goniometer

Pain (VAS)- Pain

G2: Piroxican tablets

(Pharmacological)

n = 102,

56.7 (10.7); NR

Wang et al., 2011a [113]

Clinical and radiographic

NR

G1: Aquatic exercise therapy

(Non-pharmacological)

12 weeks

(12 weeks)

n = 26,

66.7 (5.6); 26.6 (2.5)

Flexion- Standard goniometer

KOOS- Pain, Symptoms, ADL, QOL Sports recreation

G2: Land based exercises

(Non-pharmacological)

= 26,

68.3 (6.4); 25.4 (2.4)

G3: Control group- No treatment

(No treatment)

n = 26,

67.9 (5.9); 26.6 (2.1)

Wang et al., 2018 [114]

ACR

II to IV

G1: Intraarticular hyaluronic acid and corticosteroid injection

(Pharmacological)

1 session

(1 session)

n = 60,

63.6 (6.2); 25.3 (3.2)

Flexion- Goniometer

Pain (VAS)- Pain in the knee

WOMAC- total

G2: Intraarticular hyaluronic injection (Pharmacological)

n = 60,

62.5 (6.6); 26 (4.2)

Yurtkuran et al., 2006), 2006 [115]

ACR

II to III

G1: balenotherapy, pool full of spa water

(Non-pharmacological)

2 weeks

(2 weeks)

n = 29,

52.9 (6.8); 30.8 (6.7)

Flexion- Universal goniometer

Pain (VAS)- Pain on movement

WOMAC- Pain, Function, Stiffness, Total

G2: balenotherapy,tap water heated (Non-pharmacological)

n = 27

55.5 (6.2); 33.8 (3.9)

Zaidi et al., 2009 [116]

Clinical

II to III

G1: leeching therapy + traditional unani herbal treatment

(Pharmacological)

6 weeks

(6 weeks)

= 20,

59.9 (2.8);27.5 (31)

Flexion-Goniometer

WOMAC- Pain, Function, Stiffness

G2: Control group: traditional unani herbal treatment

(Pharmacological)

n = 20,

57.9 (7.5); 27.5 (33)

  1. astudies did not include in meta-analytic models as no enough data to perform relationships
  2. OA osteoarthritis, SD standard deviation, BMI body mass index, KL Kellgren and Lawrence system of grading, ACR American College of Rheumatology, = sample size, treatment group, NR not reported, VAS visual analogue scale, WOMAC Western Ontario and McMaster Universities Arthritis Index, KOOS Knee injury and Osteoarthritis Outcome Score, NPRS numeric pain rating scale, SF-36 36-Item Short Form Health Survey, ADL activity of daily living, QOL, quality of life, UST ultra sound therapy, TENS transcutaneous electrical nerve stimulation, SWD short wave diathermy, PNF Proprioceptive Neuromuscular Facilitation, WHO World Health Organization