Table 2. Enrollment population characteristics.

Characteristic	No. (%)
Year of ANC enrollment
2016	54 (12.7)
2017	342 (80.7)
2018	28 (6.6)
Facility
#1, Coastal Kenya	65 (15.3)
#2, Central Kenya	182 (42.9)
#3, Central Kenya	67 (15.8)
#4, Western Kenya	110 (25.9)
Diagnosis and ART status
Previously initiated on ART	250 (59.0)
Newly initiated on ART	170 (40.1)
Missing	4 (0.9)
Gestational age at delivery
Preterm (<37 weeks)	74 (17.5%)
Early term (37 - <39 weeks_	63 (14.9%)
Full term (39 - <41 weeks)	117 (27.6%)
Late term (41 - <42 weeks)	30 (7.1%)
Postterm (≥42 weeks)	26 (6.1%)
Unknown	114 (26.9%)
	Median (IQR)
Maternal age at enrollment (yr)	31.0 (26, 35)
Gestational age at enrollment (wk)	23.1 (17.3, 28.9)
Time on ART at enrollment (mo)	20.4 (0, 44.5)