The SOC therapy for this patient population is Physical Therapy. No medication or medical device therapy was included. In addition to SOC, patients in this arm were allocated to Epley Maneuver. The first treatment maneuver was performed once by a physician according to the assigned treatment group. The patient simultaneously received verbal instructions on how to perform the maneuver. Fifteen minutes after the first diagnostic maneuver, a second diagnostic maneuver was carried out in order to evaluate the effect of a single maneuver.

For the self-maneuvers, patients received written instructions with figures on how to perform the EM independently in a home environment. For the self-maneuver at home, the modified Epley self-maneuver was done by the patient with a pillow under the shoulders.

The frequency at home was three times in the morning, three times at noon, and three times in the evening, i.e., nine times per day.

The SOC therapy for this patient population is Physical Therapy. No medication or medical device therapy was included. In addition to SOC, patients in this arm were allocated to the SemontPLUS Maneuver. The first treatment maneuver was performed once by a physician according to the assigned treatment group. For the SM+, the angle of the 60° overextended head and body was measured by an inclinometer application. The patient simultaneously received verbal instructions on how to perform the maneuver. Fifteen minutes after the first diagnostic maneuver, a second diagnostic maneuver was carried out in order to evaluate the effect of a single maneuver.

For the self-maneuvers, patients received written instructions with figures on how to perform the SM+ independently in a home environment.

The frequency at home was three times in the morning, three times at noon, and three times in the evening, i.e., nine times per day.

The patient is sitting with both feet on the table or bed with the head looking forward. Subsequently, they let themselves fall backwards with a pillow under the shoulder and the head is turned 45° to the right. They stay in this position for 30 seconds. Afterwards, they turn the head quickly 90° to the left side followed by a turn of the whole body to the left so that their nose is pointing at the floor. They stay in this position for another 30 seconds.

Subsequently, the patients sit themselves up with the head still turned 45° to the left. They can help themselves by using both arms. After a few seconds, they can turn the head slowly back to the neutral position facing forward.

Patients had to document whether they could provoke positional vertigo every morning. The primary endpoint was the number of days until no positional vertigo could be induced on three subsequent mornings.

How many patients in both treatment groups become vertigo and nystagmus-free after a single performance of the allocated treatment maneuver performed by a physician.