Skip to main content

Advertisement

Table 3 Factors correlated with the duration of norovirus shedding among infected employees using the Kaplan-Meier method

From: Norovirus shedding among symptomatic and asymptomatic employees in outbreak settings in Shanghai, China

Variables Participants
n = 88 (%)
Mean (95% CI) Shedding duration in different quartile (days)a P value
25% 50% 75%
Gender 0.42
 Male 47 (53.4) 7.2 (5.9–8.4) 9 7 3  
 Female 41 (46.6) 6.6 (5.7–7.4) 8 7 5
Age 0.12
 0–39 63 (71.6) 6.6 (5.7–7.4) 8 7 4  
   ≥40 25 (28.4) 7.7 (6.0–9.3) 9 8 5
Symptoms b
 Yes 27 (30.7) 9.8 (8.2–11.4) 13 9 7 < 0.01
 No 61 (69.3) 5.6 (5.0–6.3) 8 7 3  
Total 88 (100.0) 6.9 (6.1–7.7) 8 7 4
  1. aShedding duration in different quartile, including 75, 50 and 25%, was used to indicate the corresponding proportion of NoV-infected employee still shedding virus at that time
  2. bIn the Cox proportional-hazards model after adjusting age and gender (male vs. female), shedding duration was still significantly longer in symptomatic norovirus-infected employees compared with asymptomatic ones (HR = 3.4, 95% CI: 1.9–5.9, P < 0.01)