Histogram

A4b. Visit of Sleep Study vs Gestational age (weeks) at sleep study visit date
N Mean StdDev Median Min Max Unknown Total
Visit 1 3,012 12.3 ± 1.5 12.6 6.0 20.9 - 3,012
Visit 3 2,332 27.9 ± 1.7 28.3 22.0 35.1 - 2,332
Race/ethnicity combined categories derived from V1AF05 and V1AF07a-g vs Gestational age (weeks) at sleep study visit date
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 3,012 12.3 ± 1.5 12.6 6.0 20.9 - 3,012
Non-Hispanic White 1,842 12.1 ± 1.6 12.6 6.0 18.0 - 1,842
Non-Hispanic Black 359 12.3 ± 1.6 12.7 6.1 20.9 - 359
Hispanic 557 12.5 ± 1.4 12.9 6.6 15.0 - 557
Asian 112 12.7 ± 1.2 13.0 7.7 14.4 - 112
Other 142 12.2 ± 1.6 12.6 7.4 14.9 - 142
Race/ethnicity combined categories derived from V1AF05 and V1AF07a-g vs Gestational age (weeks) at sleep study visit date
Visit 3
N Mean StdDev Median Min Max Unknown Total
Total 2,332 27.9 ± 1.7 28.3 22.0 35.1 - 2,332
Non-Hispanic White 1,494 27.9 ± 1.7 28.3 22.0 35.1 - 1,494
Non-Hispanic Black 247 28.2 ± 1.8 28.4 22.7 33.4 - 247
Hispanic 397 27.8 ± 1.7 28.0 22.1 32.9 - 397
Asian 84 28.1 ± 1.6 28.4 22.7 30.9 - 84
Other 110 27.8 ± 1.9 28.3 22.4 30.9 - 110