Objective To sift through the hygienic indicators for better guidance in management and maintenance of household water purify systems.
Methods The improved Delphi method was adopted to screen indicators. The first-round consultation form was based on literature review and pollution characteristics of household water purify systems in Shanghai. Twenty-two experts from relevant fields were invited to the consultation. The form content was adjusted according to the feedbacks and delivered to the experts again. Consultation stopped when experts reached a consensus.
Results The responding rates of the 2 consultation rounds were both 100%, and the authoritative coefficients of experts were 0.80 and 0.81, respectively. The coordination coefficient of the first round was 0.174 ( χ2= 6.39, P > 0.05), and the final coordination coefficient was 0.835 (χ2=19.89, 0.05 < P < 0.10). The concentration degree of engaged experts' views and the consensus for 14 indicators were considered at a high level.
Conclusion The Delphi method is feasible to screen hygienic indicators for household water purify systems and the indicators obtained are acceptable in hygiene evaluation and daily management.
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