Groot, K.I. de

anxiety patient surgery postoperative state variable preoperative recovery study postoperative anxiety postoperative state chapter aspect measure expectation stress complaint postoperative pain fatigue preoperative anxiety month effect outcome influence level outcome measures behaviour disorder monitoring tension blunting result disappointment situation leg pain group trait anxiety state anxiety adaptive preoperative variables relation strategy information preparation distress preoperative state anxiety event research difference association trait johnston anxiety aspects boeke variabie questionnaire biographic correlation operatie postoperative distress control table finding activity salmon postoperative disappointment adaptivenes score ënten postoperative variables condition severity amount scale personality indication aftel preoperative anxiety aspects intervention angst