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Med J Aust. 1999 Nov 1;171(9):467-70.

Iodine deficiency in ambulatory participants at a Sydney teaching hospital: is Australia truly iodine replete?

Author information

1
Department of Endocrinology, Royal North Shore Hospital, St Leonards, NSW. jennyeg@hotmail.com

Abstract

OBJECTIVE:

To assess iodine status in four separate groups--pregnant women, postpartum women, patients with diabetes mellitus and volunteers.

DESIGN AND SETTING:

Prospective cross-sectional study at a tertiary referral hospital in Sydney.

PARTICIPANTS:

81 pregnant women attending a "high risk" obstetric clinic; 26 of these same women who attended three months postpartum; 135 consecutive patients with diabetes mellitus attending the diabetes clinic for an annual complications screen; and 19 volunteers. There were no exclusion criteria.

METHODS:

Spot urine samples were obtained, and urinary iodine was measured by inductively coupled plasma mass spectrometer.

OUTCOME MEASURES:

Iodine status based on urinary iodine concentration categorised as normal (> 100 micrograms/L), mild deficiency (51-100 micrograms/L) and moderate to severe deficiency (< 50 micrograms/L).

RESULTS:

Moderate to severe iodine deficiency was found in 16 pregnant women (19.8%), five postpartum women (19.2%), 46 patients with diabetes (34.1%) and five volunteers (26.3%). Mild iodine deficiency was found in an additional 24 pregnant women (29.6%), nine postpartum women (34.6%), 51 patients with diabetes (37.8%) and 9 normal volunteers (47.4%). Median urinary iodine concentration was 104 micrograms/L in pregnant women, 79 micrograms/L in postpartum women, 65 micrograms/L in patients with diabetes mellitus and 64 micrograms/L in volunteers.

CONCLUSIONS:

The high frequency of iodine deficiency found in our participants suggests that dietary sources of iodine in this country may no longer be sufficient. Further population studies are required.

PMID:
10615339
[Indexed for MEDLINE]

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