Table 1.
Participant characteristics at baseline, Preemie Tots trial (n = 31), 2012–2015.
| Baseline characteristics | Omega 3-6-9 Group (n = 15) |
Placebo Group (n = 16) |
Full Sample (n = 31) |
Number of Missing Observations |
|---|---|---|---|---|
| Child characteristics | ||||
| Age at randomization, months, unadjusted for prematurity, median (interquartile range (IQR)) | 30 (11) | 25 (12) | 27 (13) | 0 |
| Gestational age at delivery, completed weeks, median (IQR) | 27 (3) | 28 (4) | 27 (4) | 0 |
| Sets of twins, n | 1 | 3 | 4 | 0 |
| Gender, male, n (%) | 8 (53) | 13 (81) | 21 (68) | 0 |
| Birthweight, grams, mean (standard deviation (SD)) | 940 (241) | 1021 (361) | 982 (306) | 2 |
| Race, n (%) – Caucasian/White | 8 (53) | 10 (62) | 18 (58) | 0 |
| African-American/Black | 4 (27) | 6 (38) | 10 (32) | – |
| Other or multiple races | 3 (20) | 0 (0) | 3 (10) | – |
| Ethnicity, n (%) – Hispanic or Latino | 3 (20) | 0 (0) | 3 (10) | 0 |
| Child diagnosed with ASD or other developmental disability prior to enrollment, n (%) | 4 (27) | 2 (13) | 6 (19) | 0 |
| Postal questionnaire screening results | ||||
| Responds to name (not true/rarely), n (%) | 1 (7) | 0 (0.00) | 1 (3) | 0 |
| Responds to joint attention (not true/rarely), n (%) | 1 (7) | 0 (0.00) | 1 (3) | 0 |
| Pervasive developmental disorders screening test – II, stage 2 (PDDST-II, >5), n (%) | 10 (67) | 10 (63) | 20 (65) | 0 |
| Brief Infant toddler social and emotional assessment competence (BITSEA, <15th percentile), n (%) | 9 (60) | 11 (69) | 20 (65) | 0 |
| Total number of screening measures failed (via postal questionnaire, max = 4), n (%) – 1 measure | 10 (67) | 11 (69) | 21 (68) | 0 |
| 2 measures | 4 (27) | 5 (31) | 9 (29) | – |
| 3 measures | 1 (7) | 0 (0) | 1 (3) | – |
| Caregiver and household characteristics | ||||
| Caregiver age at enrollment, median (IQR) | 34 (11) | 33 (9) | 33 (11) | 0 |
| Caregiver relationship to child, n (%) – Mother | 15 (100) | 15 (94) | 30 (97) | 0 |
| Caregiver marital status, n (%) – married or living with partner | 9 (60) | 9 (56) | 18 (58) | 0 |
| Separated | 1 (7) | 0 (0) | 1 (3) | – |
| Single never married or not living with partner | 5 (33) | 7 (44) | 12 (39) | – |
| Annual household income <$35,000 USD, n (%) | 10 (67) | 7 (44) | 17 (55) | 0 |
| Caregiver education, n (%) – high school/GED or less | 5 (33) | 6 (38) | 11 (35) | 0 |
| Some college/associate's degree | 5 (33) | 2 (13) | 7 (23) | – |
| Bachelor's degree or higher | 5 (33) | 8 (50) | 13 (42) | – |