Table 4.
Change in Urinary Iodine Concentration from Baseline to Postintervention in the Mommy's Food Trial Participants
| UIC baseline, μg/L | UIC postintervention |
pc | |||||
|---|---|---|---|---|---|---|---|
| Control |
Intervention |
||||||
| Increase, n (%)a | Decrease, n (%)a | Stable, n (%)a | Increase, n (%)b | Decrease, n (%)b | Stable, n (%)b | ||
| <50 | 4 (7) | 5 (8) | 3 (5) | 7 (12) | 0 | 0 | 0.034 |
| 50–100 | 9 (15) | 9 (15) | 4 (7) | 15 (25) | 7 (12) | 9 (15) | 0.243 |
| >100 | 4 (7) | 17 (28) | 6 (10) | 3 (5) | 15 (25) | 5 (8) | 0.847 |
| All | 17 (28) | 31 (51) | 13 (21) | 25 (41) | 22 (36) | 14 (23) | 0.081 |
Increase and decrease were defined as a change larger than ±10% from baseline to postintervention.
a
Percent within control group.
b
Percent within intervention group.
c
Differences tested between increase and decrease in the control and intervention groups using Pearson's chi-square test or Fisher's exact test. A two-sided p-value of < 0.05 was considered statistically significant.