Incidence and influencing factors of recurrence of hand-foot-and-mouth disease in Jiangbei District of Ningbo City between 2012 and 2014 / 中国感染控制杂志

ABSTRACT

Objective To investigate the incidence of recurrence and occurrence rate of recurrence of hand-foot-and-mouth disease (HFMD)in Jiangbei District of Ningbo City between 2012 and 2014,analyze the influencing fac-tors,and provide a scientific basis for the prevention and control of HFMD.Methods Data of HFMD in Jiangbei in 2012-2014 were collected from China Disease Surveillance Information System,immunization data were from Im-munization Programme Information System of Ningbo City,the recurrent infectious cases were selected and analyzed by descriptive epidemiological methods.Results The occurrence rate of recurrent HFMD in Jiangbei in 2012-2014 was 5.40% ,the median month of patients with single occurrence and recurrence of HFMD were 33.77(20.03, 47.83)and 38.26(22.05,54.75)months respectively,median month of patients with the initial occurrence were 23.93(15.87,36.87)months,median of time interval of recurrent HFMD was 10.27(5.23,16.06)months. The oc-currence rate of recurrence was the highest in 3- years old group(χ2= 37.51,P<0.001). Most were scattered chil-dren and children in child-care center. Female was a protective factor of recurrence of HFMD (OR,0.73[95% CI, 0.57-0.92]),while children in child-care center was a risk factor (OR,1 .46[95% CI,1 .16-1 .84]). The median attack rate of recurrence in HFMD group and control group in blocks within 7 days were 10.36(9.29,11.44)/100000 and 8.95(8.16,9.74)/100000 respectively,there was significant difference(Z= -2.68,P<0.001). In-oculation frequency between recurrent HFMD group and control group was not significantly different (Z= -1.38,P= 0.17).Conclusion The epidemic of recurrence of HFMD was serious in Jiangbei District of Ningbo City between 2012 and 2014,boys and children in child-care center should be paid attention,contacts with patients should be re-duced,and targeted prevention and control measures should be carried out.