In 9.2 % of women , lAP was less than 11 mmHg ( physiologically normal ) , in 49 % -- from 12 to 15 mmHg ( degree I of intra-abdominal hypertension ( IAH ) ) , in 40.3 % -- from 16 to 20 mmHg ( degree II of IAH ) , in 1.5 % -- from 21 to 25 mmHg ( degree III of IAH ) .