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Table 3 Summary of daily iodine intake, iodine excretion, and iodine retention for the subjects (mean ± SD)

From: Exploration of the lower threshold of iodine intake in Southern Chinese young adults based on ‘overflow theory’ in an iodine balance study

  Stage 1 Stage 2 Stage 3 Pc
Male (n=14)
 Total iodine intake, μg/d 22.7±3.6 35.1±3.7a 52.2±3.8ab <0.001
 Urine iodine, μg/d 56.4±13.2 51.4±11.5 a 78.9±15.4 ab <0.001
 Feces iodine, μg/d 9.1±4.0 11.9±3.4 16.7±5.8a <0.001
 Total iodine excretion, μg/d 64.7±13.9 62.3±12.6 94.3±14.5ab <0.001
 Iodine balance, μg/d -35.2±19.5 -21.0±19.8a -33.5±26.9b <0.001
Female (n=23)
 Total iodine intake, μg/d 16.6±3.1 29.7±2.7 a 48.0±2.7 ab <0.001
 Urine iodine, μg/d 40.8±9.5 47.8±8.1a 66.4±11.0ab <0.001
 Feces iodine, μg/d 6.2±1.6 8.0±3.1 9.7±6.5a 0.044
 Total iodine excretion, μg/d 47.0±9.9 55.5±8.1a 75.7±12.4ab <0.001
 Iodine balance, μg/d -30.5±9.3 -25.9±7.3 -27.6±12.1 0.262
Total (n=37)
 Total iodine intake, μg/d 18.9±4.4 31.7±4.1 a 49.6±3.7 ab <0.001
 Urine iodine, μg/d 46.7±13.3 49.2±9.6 71.1±14.0ab <0.001
 Feces iodine, μg/d 7.3±3.1 9.5±3.7a 12.3±7.1a <0.001
 Total iodine excretion, μg/d 53.7±14.3 58.1±10.4 a 82.7±15.9 ab <0.001
 Iodine balance, μg/d -32.3±14.0 -24.1±13.4a -29.8±18.9 0.003
  1. aP < 0.05 between each periods with the stage 1; bP < 0.05 between each stages with the stage 2; cthe differences among the three stages were evaluated using repeated-measure ANOVA with Bonferroni correction