Sentence: Comparing the combination of nalidixic acid and metronidazole with metronidazole alone , 17.5 % more children treated with the combination recovered by day 3 of treatment ( p = 0.08 ) and the mean stool frequency ascertained on day 7 for the previous 24 h was 26.8 % less in them ( p = 0.05 ) .
Drug combination annotation:
[{'class': 'POS', 'spans': ['nalidixic acid', 'metronidazole'], 'is_context_needed': False}]