중재 평균 치료기간은 40.67±32.07일 (14일~4개월) 이었으며 한 달은 30일로 가정하여 평균값을 계산하였다.
The average duration of intervention was 40.67±32.07 days or 4 to 14 months, and the average value was calculated assuming that one month was 30 days.