Skip to main content
. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Environ Res. 2014 Apr 5;131:95–103. doi: 10.1016/j.envres.2014.02.017

Table 1.

Study cohort characteristics by child’s age groupa.

CCCEH Children with residential monitoring
Children with urine collection
N Cohort
727
Prenatal
98
5 Year
397
9 Year
143
3 Year
409
5 Year
431
7 Year
342
9 Year
253
Subject characteristics

Race/Ethnicity
 Dominican 473 (65.1) 67 (68.4) 256 (64.5) 85 (59.4) 244 (59.7)* 264 (61.3)* 189 (55.3)* 143 (56.5)*
 African 254 31 141 58 165 167 153 110
 American (34.9) (31.6) (35.5) (40.6) (40.3) (38.7) (44.7) (43.5)
Sex of child
 Girls 376 (51.7) 52 (53.1) 213 (53.7) 77 (53.8) 218 (53.3) 233 (54.1) 184 (53.8) 135 (53.4)
 Boys 351 (48.3) 46 (46.9) 184 (46.3) 66 (46.2) 191 (46.7) 198 (45.9) 158 (46.2) 118 (46.6)
Maternal education
 ≥ High school 456 (64.0) 52 (53.1)* 246 (62.1) 85 (59.9) 255 (63.3) 272 (64.6) 217 (65.4) 157 (63.3)

Home characteristics

Smoker in homeb 246 (34.3) 35 (36.1) 66 (16.9) 17 (12.1) 87 (21.3) 79 (18.6) 61 (18.1) 32 (13.0)
Gas stove cooking 686 (95.5) 92 (97.9) 370 (94.4)* 128 (91.4) 379 (93.1) 399 (93.9)* 315 (92.9)* 229 (92.7)
Burning candles 357 (49.4) 51 (52.6) 187 (47.5) 66 (47.1) 196 (48.3) 201 (47.0) 154 (45.2) 110 (44.5)
Burning incense 165 (23.1) 20 (20.6) 79 (20.1) 29 (20.7) 90 (22.2) 102 (23.9) 77 (22.6) 55 (22.4)
a

Includes participants with at least one residential air monitoring sample or urine sample. Number (percent) are presented; Chi-square (χ2) tests conducted to compare study cohort characteristic between the children included in the analysis and those excluded due to missing PAH indoor monitoring or urine collection within each age group;

b

The proportion reporting the current exposure to ETS at prenatal was statistically higher compared to those at ages 5 and 9 years (χ2; p<0.001); boldface type indicates statistical significance with *p-value<0.05.