Social & Preventive Medicine Which of the following is not true about non-randomized trials? A Approach of comparability is high B Degree of comparability is high C The experiment can serve as its own control or can utilize a natural control D Several trials may be needed before evaluation is considered conclusive 💡 Explanation Which of the following is not true about non-randomized trials? ✓ Correct Answer: B. Degree of comparability is high