Table 1.
Distribution of socio-demographic characteristics according to dietary and supplemental iodine intake, PRISM (Programming of Intergenerational Stress Mechanisms) pregnancy cohort.
| N | Percent | Food and Supplement Iodine (µg/Day), Median (IQR) # | p-Value | |
|---|---|---|---|---|
| Overall | 837 | 100 | 187 (116, 315) | |
| Maternal factors | ||||
| Age at birth, years, mean (SD) * | 29.8 (5.92) | |||
| Age at birth, years | 0.4 | |||
| 18–<25 | 194 | 23.2 | 175 (111, 324) | |
| 25–<35 | 473 | 56.5 | 188 (114, 310) | |
| ≥35 | 170 | 20.3 | 198 (127, 320) | |
| Race/ethnicity | 0.05 | |||
| Non-Hispanic White | 142 | 17.3 | 151 (110, 269) | |
| Black/Hispanic Black | 352 | 43 | 198 (115, 337) | |
| Non-Black Hispanic | 288 | 35.1 | 195 (126, 323) | |
| Other | 37 | 4.52 | 153 (107, 281) | |
| Missing | 18 | |||
| Education | 0.6 | |||
| High school or less | 321 | 39.2 | 185 (111, 331) | |
| More than high school | 496 | 60.7 | 191 (118, 311) | |
| Missing | 20 | |||
| Depression pre-pregnancy | 0.02 | |||
| Yes | 208 | 25.3 | 204 (131, 378) | |
| No | 614 | 74.7 | 181 (112, 304) | |
| Missing | 15 | |||
| Pregnancy depressive symptoms (Global EPDS) | 0.05 | |||
| <10 | 538 | 71.5 | 177 (112, 312) | |
| ≥10 | 214 | 28.5 | 203 (127, 345) | |
| Missing | 85 | |||
| Postpartum depressive symptoms (Global EPDS) | 0.6 | |||
| <10 | 454 | 79.2 | 191 (117, 319) | |
| ≥10 | 119 | 20.8 | 168 (116, 324) | |
| Missing | 264 | |||
| Pregnancy anhedonia symptoms | 0.6 | |||
| 0 | 552 | 73.5 | 185 (115, 324) | |
| 1–6 | 199 | 26.5 | 193 (120, 317) | |
| Missing | 86 | |||
| Postpartum anhedonia symptoms | 0.04 | |||
| 0 | 391 | 68.2 | 198 (126, 319) | |
| 1–6 | 182 | 31.8 | 158 (108, 321) | |
| Missing | 264 | |||
| Pregnancy depressive subscale symptoms | 0.5 | |||
| <4 | 339 | 45.1 | 180 (111, 318) | |
| ≥4 | 413 | 54.9 | 193 (118, 322) | |
| Missing | 85 | |||
| Postpartum depressive subscale symptoms | 0.8 | |||
| <4 | 292 | 51.0 | 188 (117, 323) | |
| ≥4 | 281 | 49.0 | 187 (118, 315) | |
| Missing | 264 | |||
| Thyroid disease § | 0.4 | |||
| Yes | 52 | 6.33 | 170 (113, 278) | |
| No | 769 | 93.7 | 190 (116, 320) | |
| Missing | 16 | |||
| Child sex | 0.8 | |||
| Female | 422 | 50.5 | 181 (116, 323) | |
| Male | 413 | 49.5 | 192 (115, 305) | |
| Missing | 2 |
* SD—standard deviation; # IQR—interquartile range. § Treatment for a thyroid disease was based on self-report and medical record extraction. p-value for Wilcoxon–Mann–Whitney rank-sum test.