Table 3.
Parameters of Human OPs in the Frequency Domain
| Parameter | Intensity | Group | Mean (SD) | ANOVA* |
|---|---|---|---|---|
| E (μV2 · s−1) | 65 R* | Term-born infants | 80 (200) | Fhistory = 0.01; P = 0.935 |
| ROP infants | 370 (620) | Fage = 25.92; P < 0.001 | ||
| Adult controls | 2,840 (2,540) | Fintensity = 20.94; P < 0.001 | ||
| ROP adults | 2,150 (2,280) | Fhistory×age = 11.99; P < 0.001 | ||
| Fhistory×intensity = 0.41; P = 0.900 | ||||
| 8,500 R* | Term-born infants | 580 (780) | Fage×intensity = 4.82; P < 0.001 | |
| ROP infants | 7,180 (10,180) | Fhistory×age×intensity = 5.95; P < 0.001 | ||
| Adult controls | 17,860 (20,930) | |||
| ROP adults | 10,020 (8,110) | |||
| Fpeak (Hz) | 65 R* | Term-born infants | 137 (35) | Fhistory = 0.35; P = 0.558 |
| ROP infants | 146 (32) | Fage = 24.81; P < 0.001 | ||
| Adult controls | 152 (10) | Fintensity = 5.69; P < 0.001 | ||
| ROP adults | 147 (13) | Fhistory×age = 3.44; P = 0.067 | ||
| 8,500 R* | Term-born infants | 127 (28) | Fhistory×intensity = 0.52; P = 0.817 | |
| ROP infants | 112 (19) | Fage×intensity = 1.03; P = 0.412 | ||
| Adult controls | 134 (16) | Fhistory×age×intensity = 2.34; P = 0.023 | ||
| ROP adults | 140 (14) | |||
| Log i1/2 (log R*) | Term-born infants | 3.049 (0.484) | Fhistory = 0.24; P = 0.624 | |
| ROP infants | 3.201 (0.276) | Fage = 13.34; P < 0.001 | ||
| Adult controls | 2.753 (0.465) | Fhistory×age = 0.82; P = 0.368 | ||
| ROP adults | 2.708 (0.546) |
*
History (ROP vs. healthy) and age (adult vs. infant) factors are between subjects; intensity factor is within subjects. Significance was defined as P < 0.05.