Table 1.

Characteristics of pregnant women enrolled in the Navajo Birth Cohort (N=607)

Characteristic	NBCS	Navajo Nation	NHANES^a
Age – Median	26 (25–27)	32.0 (31.4–32.6)^b	29.5 (29.1–29.9)
Body Mass Index (BMI):
<=25 (Normal)	28.2% (24.6–32.1%)	17.6% (16.7–18.5%)^c	42.6% (40.4–44.8%)
25–30 (Overweight)	30.2% (26.4–34.0%)	32.8% (31.7–33.9%)^c	24.2% (22.74–25.7%)
30–35 (Obese)	41.7% (37.6–45.9%)	49.6% (48.5–50.7%)^c	33.3% (31.6–35.0%)
Education (Less than High School)	21.7% (18.5–25.2%)	18.4% (17.6–19.2%)^d	24.7% (22.8–26.6%)
Household Income <$20,000 annually	65.7% (61.2–69.9%)	42.6% (41.2–44.0%)^e	14.1% (12.2–16.0%)
Not working	68.8% (64.9–72.5%)	65% (64.5–65.5%)^f	35.0% (32.8–37.2%)
Smoking status
Ever smoker	18.2% (15.3–21.8%)	14.1% (13.1–15.1%)^g	31.3% (29.2–33.4%)
Never smoker	81.8% (78.4–84.9%)	85.9% (84.9–86.9%)^g	68.7% (66.6–70.8%)
Not reported	5.3 %	-	-

Note.

NHANES – National Health and Nutrition Evaluation Survey 2011–12, 2013–14, and 2015–16, females ages 14–45

Women only, from Table S0101, 2015 American Community Survey [5-year estimates], margin of error is a 90% Confidence Interval

From Table S1501, 2015 American Community Survey [5-year estimates], margin of error is a 90% Confidence Interval

From Table B19001C, 2015 American Community Survey [5-year estimates], margin of error is a 90% Confidence Interval

From Table S2301, 2015 American Community Survey [5-year estimates], margin of error is a 90% Confidence Interval