Table 1.

Characteristics of the study population, overall and by quartile of residential proximity to the edge of the nearest flower crop.

Characteristic	Overall	Quartiles of residential proximity to nearest flower crop
	n=307	0-185m n=77	186-350m n=76	351-605m n=76	>605m n=78
Child’s age, y	6.6 (1.6)	6.6 (1.6)	6.5 (1.5)	6.9 (1.6)	6.5 (1.6)
Child sex, %
Girls	49	45	47	53	51
Boys	51	55	53	47	49
Race, %
Mestizo	72	68	71	73	77
Indigenous	21	26	25	17	17
Other	2	0	3	5	0
Missing	5	6	1	5	6
Height-for-age z score, SD	−1.25 (0.96)	−1.48 (0.97)	−1.15 (0.99)	−1.29 (0.92)	−1.05 (0.94)
Hemoglobin, mg/dL	12.7 (1.2)	12.6 (1.2)	12.7 (1)	12.9 (1.3)	12.3 (1.1)
Acetylcholinesterase, U/mL	3.14 (0.49)	3.09 (0.52)	3.09 (0.49)	3.25 (0.49)	3.12 (0.43)
Mother’s education, y	7.3 (3.8)	6.6 (3.1)	8.8 (4.1)	7.1 (3.9)	6.5 (3.8)
Cohabitation with a flower plantation worker, %	50	57	51	42	47

Values shown are mean (SD), unless otherwise noted.