Sentence: was lowest in the propofol + dexmedetomidine group ( all , P < 0.05 ) , and the AUC of pulse oximetry was significantly higher in the propofol + dexmedetomidine and propofol + ketamine groups compared to the other 2 groups ( both , P < 0.05 ) .
Drug combination annotation:
[{'class': 'POS', 'spans': ['propofol', 'ketamine'], 'is_context_needed': True}, {'class': 'COMB', 'spans': [0, 1, 2, 3], 'is_context_needed': True}]