Table 1 Subject demographics and clinical characteristics.
By subject (N = 71) | (SD) [range], weeks |
|---|---|
Gestational age, mean (SD) [range], weeks | 26.8 (2.5) [22.7–32.3] |
Birth weight, mean (SD) [range], g | 901 (329) [400–1915] |
Sex, No. (%) | |
Female | 34 (48%) |
Male | 37 (52%) |
Race, No. (%) | |
Black | 32 (45%) |
White | 27 (38%) |
Asian | NA |
Other | 12 (17%) |
Ethnicity, No. (%) | |
Hispanic | 14 (20%) |
Not Hispanic or Latino | 57 (80%) |
By exam (N = 204): | |
Post-menstrual age, mean (SD) [range], weeks | 37.7 (4.6) [30.7–53.9] |
Fraction of inspired oxygen, mean (SD) [range], % | 42 (31) [21–100] |
Respiratory support at exam, No. (%) | |
Room air | 50 (25%) |
Nasal cannula | 51 (25%) |
High flow nasal cannula | 10 (5%) |
Positive airway pressure (Continuous or Bi-level)a | 69 (34%) |
Ventilator | 24 (12%) |
Exam duration | |
Binocular indirect ophthalmoscopy, mean (SD) [range], minutes (n = 192)b | 1.6 (0.8) [0.25–4.8] |
Laser speckle contrast imaging, mean (SD) [range], minutes (n = 87)b | 10.3 (3.2) [3.4–15.6] |
