Table 1 Characteristics of study sample (n = 94) by diagnostic status in the CHARGE Study, California, 2003 - 2005
From: Polybrominated diphenyl ethers in relation to autism and developmental delay: a case-control study
AU/ASD | DD N = 24 | TD n = 21 | |||
|---|---|---|---|---|---|
Characteristic: Categorical variables: | Weighted (unweighted) %† | Weighted (unweighted) %† | Weighted (unweighted) %† | AU/ASD vs. TD p-value† | DD vs. TD p-value† |
Child's sex, male | 92 (88) | 68 (63) | 86 (86) | 0.81 | 0.19 |
Child's race/ethnicity | |||||
White | 30 (43) | 18 (29) | 32 (43) | 0.94 | 0.56 |
Hispanic | 45 (43) | 60 (50) | 48 (43) | ||
Other | 25 (14) | 22 (21) | 20 (14) | ||
Mother's education | |||||
≤ High school | 12 (10) | 44 (33) | 36 (28) | 0.03 | 0.10 |
Some college | 60 (51) | 45 (46) | 26 (24) | ||
College or higher degree | 28 (39) | 11 (21) | 38 (48) | ||
Computers in household | |||||
None | 13 (9) | 37 (29) | 24 (20) | 0.61 | 0.35 |
One | 52 (52) | 24 (25) | 47 (50) | ||
Two or more | 35 (39) | 39 (46) | 29 (30) | ||
New car purchased in the first 2 years of child's life | 21 (22) | 24 (30) | 10 (10) | 0.29 | 0.24 |
Private insurance provider‡ | 72 (80) | 50 (67) | 74 (86) | 0.88 | 0.17 |
Regional Center catchment area‡ | |||||
Alta, Far Northern, Redwood Coast | 28 (31) | 51 (54) | 29 (29) | 0.46 | 0.63 |
North Bay | 20 (23) | 5 (4) | 11 (14) | ||
East Bay, San Andreas, Golden Gate | 16 (10) | 7 (8) | 5 (10) | ||
Valley Mountain, Central Valley, Kern | 18 (18) | 17 (13) | 34 (33) | ||
LA RCs*, Orange, San Diego, Tri-counties, Inland, San Gabriel/Pomona | 18 (18) | 20 (21) | 21 (14) | ||
Child ate ocean fish (incl. tuna, caught) prior to age 2 yrs | 27 (27) | 39 (37) | 39 (43) | 0.37 | 0.99 |
Child ate freshwater fish (incl. caught) prior to age 2 yrs | 8 (7) | 7 (8) | 8 (9) | 0.99 | 0.85 |
Child's age, yrs | 3.7 (0.1) | 3.7 (0.2) | 3.7 (0.1) | 0.99 | 0.99 |
Child's weight, kg | 17.1 (0.6) | 15.4 (0.9) | 16.9 (0.8) | 0.85 | 0.23 |
Child's height, cm | 99.5 (1.4) | 96.4 (1.9) | 99.2 (1.6) | 0.90 | 0.26 |
Child's weight-to-height ratio, kg/m | 16.9 (0.4) | 15.8 (0.7) | 16.9 (0.6) | 0.92 | 0.25 |
Child's body mass index (BMI) | 16.9 (0.2) | 16.3 (0.6) | 17.0 (0.5) | 0.87 | 0.39 |
Length of breastfeeding, months | 5.7 (0.6) | 6.1 (1.7) | 6.2 (1.9) | 0.81 | 0.98 |
Mother's age, yr‡ | 30.4 (0.8) | 28.3 (1.5) | 27.7 (1.4) | 0.10 | 0.79 |
Father's age, yr‡ | 32.5 (1.0) | 30.7 (2.3) | 30.4 (1.5) | 0.25 | 0.92 |
Calendar years from first participant blood draw | 1.0 (0.1) | 1.2 (0.1) | 1.4 (0.1) | 0.006 | 0.34 |