Table 1.
Demographic, Lifestyle, and Dietary Characteristics of Women from the NHANES 2009-2010 Survey. Data are Presented for the Full Sample and by Tertiles of Nighttime Fasting Duration.
| Characteristics | Full Eligible Sample | Fasting Tertile 1 | Fasting Tertile 2 | Fasting Tertile 3 |
P-value for
differencea |
|---|---|---|---|---|---|
| mean (SEM) unless specified |
n=2,212 |
(<11.5 hrs) n=770 |
(11.5-13.49 hrs) n=746 |
(≥13.5 hrs) n=770 |
|
| Age | 46.8 (0.7) | 48.4 (1.0) | 46.6 (0.9) | 45.5 (0.7) | 0.03 |
| Ethnicity n(%) | |||||
| Non-Hispanic White | 1,138 (51.4) | 386 (55.5) | 399 (53.5) | 353 (45.8) | <0.001 |
| Non-Hispanic Black | 355 (16.0) | 110 (15.8) | 100 (13.4) | 145 (18.8) | |
| Mexican American | 379 (17.1) | 80 (11.5) | 140 (18.8) | 159 (20.6) | |
| Other race(s) | 340 (15.4) | 120 (17.2) | 107 (14.3) | 113 (14.7) | |
| Educational Attainmentb n(%) | |||||
| No High School Diploma | 549 (24.8) | 138 (19.8) | 193 (25.9) | 218 (28.8) | 0.47 |
| High School Diploma | 494 (22.3) | 154 (22.1) | 151 (20.2) | 189 (24.5) | |
| Some College | 682 (30.8) | 231 (33.2) | 229 (30.7) | 222 (28.7) | |
| College Degree | 483 (21.8) | 171 (24.6) | 172 (23.0) | 140 (18.2) | |
| BMI kg/m3 | 28.2 (0.2) | 27.5 (0.4) | 27.9 (0.4) | 29.1 (0.3) | 0.01 |
| Physical Activity n(%) | |||||
| Low | 718 (32.5) | 216 (31.0) | 235 (25.9) | 267 (28.3) | 0.99 |
| Med | 742 (33.5) | 236 (33.9) | 256 (34.3) | 250 (32.5) | |
| High | 752 (34.0) | 244 (35.1) | 255 (34.2) | 253 (32.8) | |
| Sleep (hours/night) | 7.0 (0.0) | 7.0 (0.1) | 7.17 (0.1) | 6.9 (0.1) | 0.40 |
| Daily Energy Intake (kcal/day) | 1,773.1 (22.5) | 1,914.1 (51.8) | 1,797.5 (39.2) | 1,623.3 (32.4) | <0.001 |
| Daily Energy Intake After 10 pm (kcal/day) | 51.4 (5.6) | 113.8 (12.2) | 21.4 (3.5) | 23.3 (5.4) | <0.001 |
| Nighttime Fasting Duration (hours) | 12.4 (0.1) | 9.5 (0.1) | 12.3 (0.0) | 15.1 (0.1) | <0.001 |
| Number of Eating Episodes Per Day | 4.7 (0.1) | 5.5 (0.1) | 4.8 (0.1) | 3.8 (0.1) | <0.001 |
| HbA1c (mmol/mol)c | 36.1 (0.2) | 36.5 (0.2) | 36.0 (0.2) | 35.9 (0.3) | 0.18 |
| 2-hour glucosed (mg/dL)(median Q1,Q3) | 104.1 (85.6, 131.3) | 104.7 (87.8,135.1) | 103.9 (84.8,128.5) | 104.0 (84.8,131.2) | 0.38 |
a
P-values reflect statistical comparisons of participant characteristics by tertiles of nighttime fasting duration.
b
Data on educational attainment was missing for 4 study participants.
c
Glycosylated Hemoglobin.
d
Concentration of glucose in plasma collected 2-hours after a 75-gram oral glucose-equivalent challenge (Oral Glucose Tolerance Test). 2-hour glucose data were only available for the subsample of fasting participants (n=1,334).