Table 2.
Geometric Mean Levels of Umbilical Cord Serum Cytokines According to Verbal and Performance Intelligence Quotient Scores (n = 369), Infant Growth Project, Jefferson County, Alabama, 1985–1988
| Cytokine | VIQ Score | PIQ Score | ||||||
|---|---|---|---|---|---|---|---|---|
| <70 (n = 47) | ≥70 (n = 322) | <70 (n = 43) | ≥70 (n = 326) | |||||
| GM, pg/mL | SD | GM, pg/mL | SD | GM, pg/mL | SD | GM, pg/mL | SD | |
| Interferon-γ | 6.3 | 2.3 | 5.9 | 2.6 | 4.7* | 2.1 | 6.1 | 2.6 |
| Tumor necrosis factor-α | 8.8 | 1.6 | 8.7 | 1.6 | 8.6 | 1.9 | 8.7 | 1.6 |
| Interleukin-12p70 | 3.8 | 1.5 | 4.0 | 1.7 | 3.4* | 1.5 | 4.0 | 1.7 |
| Interleukin-10 | 4.3 | 2.3 | 4.4 | 2.1 | 4.4 | 2.4 | 4.4 | 2.1 |
| Interleukin-4 | 8.1 | 2.0 | 8.3 | 2.7 | 6.7 | 2.4 | 8.5 | 2.6 |
Abbreviations: GM, geometric mean; PIQ, performance intelligence quotient; SD, standard deviation; VIQ, verbal intelligence quotient.
* P < 0.05 (2-sided t test).