Table 2 Characteristics of intervention and control groups.

From: The effectiveness of dietary intervention in osteoarthritis management: a systematic review and meta-analysis of randomized clinical trials

Authors, year, country

Intervention Diet (Details)

Groups

Control (Details)

Dietary adherences, %

 

Diet (Type)

More details

Recommendations

   

Messier et al. [7], USA

Reduced Energy Diet

Achieve a 5% average weight loss

Aim was to raise awareness regarding the significance of modifying eating habits to reduce caloric intake.

1-Dietary weight loss plus Exercise

2-Exercise

3-Dietary weight loss

3-Healthy lifestyle (control)

Social interaction and health education on topics concerning osteoarthritis, obesity, and exercise.

72

Clinton et al. [27], USA

Whole Food Plant-Based

No restriction in energy intake.

Derive a minimum of 90% of their calories from plant sources.

Using fruits, vegetables, unrefined foods, legumes, and grains, with a strict avoidance of animal products.

1-Whole Food Plant-Based

2-Control

Usual care

NA

Dyer et al. [29], UK

Mediterranean Diet

Dietary advice was provided consistent with a Mediterranean diet.

NA

1-Mediterranean

2-Control

Usual care

65

Strath et al. [32], USA

1-Low Carbohydrate Diet

20 g daily total carbohydrate intake, with the option to increase it to 40 g.

There were no restrictions on fats or protein (from meats and eggs).

Fruits were restricted, and vegetables were allowed in restricted amounts.

1-Low Carbohydrate Diet

2-Low Fat Diet

(weight loss)

3-Control

Eat as usual

Educational documents related to portion control

NA

2-Low Fat Diet

Males had a daily calorie reduction of 500 kcal, while females had a reduction of 250–300 kcal.

60% of daily calories from carbohydrates, 20% from protein, and 20% from fats.

High in fruits, vegetables, low-fat foods, whole grains, low-fat dairy, and limited cholesterol and saturated fats

Hsu et al. [8], Taiwan

Reduced Energy Diet

A balanced low-energy diet of 1200 kcal/day

An individualized nutritional plan for each participant was designed

1- Resistance Exercise Group

2- Resistance Exercise Group plus Diet Control Group

3- Diet Control Group

Resistance Exercise Group

83

Sadeghi et al. [31], Iran

1-Mediterranean.

(28 kcal/kg/day)

35% from fats, 50% from carbohydrates, and 15% from protein.

27–37 grams/day of fibre, prioritize whole grains, limit red meat to 150 grams/ month.

Patients receive mercury-free fish oil supplements twice a week.

Use olive oil for salads and canola oil for frying. The diet includes a daily serving of legumes and nuts, permits low-fat dairy, and recommends drinking six glasses of water each day

1-Mediterranean

2-Low-fat diet

3-Control

Usual care

lower than 80% were excluded

2-Low fat diet.

(28 kcal/kg/day)

20% of total daily calories from fats, 65% from carbohydrates, and 15% from protein.

In this dietary pattern, patients did not receive any advice and dietary serving were determined for each patient.

Dolatkhah et al. [28], Iran

1-Anti-inflammatory plus Reduced Energy Diet

Fresh fruits and vegetables, constituting two-thirds of the total caloric intake per meal.

Protein is derived from plant sources, and fish and low-fat dairy.

Carbohydrates are sourced from fruits, vegetables, and whole grains.

Plant-based fats, such as alpha-linolenic acid from flaxseed and walnuts, are encouraged, while trans-fatty acids should be avoided.

Olive oil is the preferred cooking oil.

Using turmeric, garlic, ginger, and cinnamon.

Omega-3 fatty acids can be added to the diet as a supplement.

1-Anti-inflammatory

2-Reduced Energy Diet

Reduced Energy Diet

64.8% women

reported being adherent every day.

25.9%women reported being adherent most days.

9.3% women

reported being adherent sometimes

2-Reduce Energy Diet

500 kcal below individual energy requirements. less than 30% of calories from fat, 55–60% from carbohydrates, and 10–15% from protein.

After introducing the diet, each participant received explanations about the food pyramid, the substitution tables, and the role of each food group.

Wolf et al. [33], USA

Reduced Energy Diet

The modification of eating habits was personalised, taking into account individual lifestyles.

Providing information about dietary fat intake and proper proportions of vegetables

1-Home-Based Exercise

2-Weight Control Nutritional Programme

3-Home-Based Exercise plus Weight Control Nutritional Programme

4-Usual care

Usual care

NA

Ghroubi et al. [30], Tunisia

Reduced Energy Diet

Reduction of caloric intake by 25-30% for participants whose habitual food consumption is between 1500-3000 calories

No additional information was provided.

1-Exercise only

2- Diet plus exercise

3- Diet only

4- Control group

Usual care

NA