Standard No.:	GB 16005-2025
English Name:	Discriminant and classification of the endemic areas of iodine deficiency disorders
Chinese Name:	碘缺乏病病区判定和划分
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-10-05
Implemented on:	2026-11-1
Status:	to be valid
Superseding:	GB 16005-2009 Delimitation for the endemic areas of iodine deficiency disorders(IDD)
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	120.0
Delivery:	via email in 1~3 business day

GB 16005-2025 Discriminant and classification of the endemic areas of iodine deficiency disorders English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS 11.020 CCS C 61 National Standards of the People's Republic of China GB 16005-2025 Replaces GB 16005-2009 Discriminant and classification of the endemic areas of iodine deficiency disorders 碘缺乏病病区判定和划分 (English Translation) Issue date: 2025-10-05 Implementation date: 2026-11-01 Issued by the State Administration for Market Regulation the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Determination of iodine deficiency disorder ward 5 Classification of types of iodine deficiency disorders Annex A (Normative) sampling methods Discriminant and classification of the endemic areas of iodine deficiency disorders 1 Scope This document specifies the indexes of judgment and division of iodine deficiency disorders and describes the corresponding judgment methods. This document is applicable to the determination and division of iodine deficiency disorders wards. 2 Normative references The following documents contain references which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 5750.2 Standard examination methods for drinking water - Part 2: Collection and preservation of water samples GB/T 5750.5 Standard examination methods for drinking water - Part 5: Inorganic nonmetallic indices WS/T 104 Diagnosis for endemic cretinism and endemic subclinical cretinism WS/T 107.1 Determination of iodine in urine - Part 1: As3+-Ce4+ catalytic spectrophotometry WS/T 107.2 Determination of iodine in urine - Part 2: inductively coupled plasma mass spectrometry method WS/T 10027 Diagnosis of endemic goiter 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 iodine deficiency disorders general term for a group of diseases and hazards caused by iodine malnutrition due to iodine deficiency in the natural environment Note: Including endemic goiter, endemic cretinism, endemic subclinical cretinism, abortion, premature birth, stillbirth, congenital malformation, etc. caused by iodine deficiency. 4 Determination of iodine deficiency disorder ward Taking administrative villages (communities) as units, surveys shall be conducted according to the sampling methods specified in Annex A, water samples shall be collected and preserved according to GB/T 5750.2, and water iodine determination shall be carried out according to GB/T 5750.5; Urinary iodine determination is performed according to WS/T 107.1 or WS/T 107.2; Endemic goiter is diagnosed according to WS/T 10027; Endemic cretinism is diagnosed according to WS/T 104. Areas where the median iodine content of residents' drinking water is less than 40 μ g/L, which meets the requirements of a) or b) and c) at the same time, are judged as iodine deficiency disease areas: a) There are new cases of endemic cretinism; b) Goiter rate: The goiter rate of children aged 8 to 10 years is greater than or equal to 5%. c) Urinary iodine: The median urinary iodine of children aged 8 ~ 10 years is less than 100 μ g/L, and the number of samples less than 50 μ g/L is more than 20%. 5 Classification of types of iodine deficiency disorders See table 1 for the classification criteria of iodine deficiency disorder ward types. Annex A (Normative) Sampling methods A.1 Sampling methods for water iodine survey For administrative villages (communities) with decentralized water supply, each administrative village (community) is divided into five directions: east, south, west, north, and middle, and 10% of the water sources are randomly selected from each direction (when there are less than 10 water sources in a certain direction Then extract the one with the largest drinking population); All administrative villages (communities) with less than 5 water sources are extracted, and one water sample is collected from each water source. collect 2 peripheral drinking water in administrative villages (communities) with centralized water supply. A.2 Sampling methods for urinary iodine survey in children Taking administrative villages (communities) as a unit, the urinary iodine content survey of children aged 8 to 10 uses a random sampling method. The children surveyed shall be 50% male and 50% female, and the total sample number must be more than 100 cases. If the number is insufficient, the urinary iodine content survey of children aged 6 to 10 years old will be conducted. Make up the number of children aged 12 or conduct a general survey of children aged 6 to 12. A.3 Sampling method for thyroid volume survey Taking administrative villages (communities) as a unit, the goiter rate survey of children aged 8 to 10 uses a random sampling method. The children surveyed should be 50% male and 50% female, and the total sample number must be more than 100 cases. If the number is insufficient, the goiter rate survey of children aged 6 to 12 years old will be completed or a general survey of children aged 6 to 12 years old will be conducted.