Table 4: Maternal side effects following medical treatment (ITT group).

Side effect Nitroglycerin Placebo P value Headache (VAS scale 1–10)  Mean (SD) 0.9 (1.6) 0.5 (1.3) 0.08  Median (range) 0.0 (0; 6) 0.0 (0; 6) Palpitations (VAS scale 1–10)  Mean (SD) 0.4 (1.1) 0.2 (0.5) 0.36  Median (range) 0.0 (0; 5) 0.0 (0; 2)

Intention to treat group, ITT: all randomized patients, including 4 patients who did not receive study medication and 2 patients who only received 0.5 mg nitroglycerin.