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Table 4 Seven main themes that influences trial participation

From: Pregnant womens’ concerns when invited to a randomized trial: a qualitative case control study

Theme

Sub codes

External influence

▪ Concern from social environment

▪ Trust in the health professional

▪ Feeling of disappointing the health professional

Research and healthcare

▪ Familiarity with scientific research

▪ Willingness to contribute to research

▪ Feeling of participating in an experiment

Perception own situation

▪ Perception own situation and medical history

▪ Feeling very eligible or very ineligible for scientific research

Study design

▪ Randomization

▪ Blinding

▪ Placebo

▪ Additional efforts

▪ Insurance medical research

Intervention

▪ Intervention

▪ Natural course

Information and counseling

▪ Written information

▪ Counseling: information and timing, atmosphere

▪ Time for consideration on participation

Uncertainty

▪ Fear

▪ Stress

▪ Doubt

▪ Physician does not know what is best