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. 2013 Mar 8;141(12):2536–2546. doi: 10.1017/S0950268813000332

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Fig. 3. — Cox proportional hazards model for duration of illness in laboratory-confirmed cases of campylobacterosis in Perth District and Wellington-Dufferin-Guelph health units (n = 227) showing hazard ratios and 95% confidence intervals. A hazard ratio >1 indicates an increased rate of symptom resolution and therefore a decreased duration of illness compared to no antimicrobial use. A hazard ratio <1 indicates a decreased rate of symptom resolution and therefore an increased duration of illness compared to no antimicrobial use. ◊, Significant effect on duration of illness; ⧫, non-significant effect on duration of illness; CIP, ciprofloxacin. * Previous medication includes only non-antimicrobial medication.