Table 2.

Characteristics of antibiotic initiators and non-initiators between 24 and 37 weeks’ gestation, The Tsepamo Study

Characteristic	Non-initiators (n=1,290,635 person-trials)		Initiators (n=17,009 person-trials)
	Number	Percent	Number	Percent
Trimester of first ANC
First (<12 weeks)	303,215	23.5%	4,309	25.3%
Second (12-24 weeks)	987,420	76.5%	12,700	74.7%
Age
<18 years	47,481	3.7%	565	3.3%
18-35 years	1,025,098	79.5%	13,925	81.9%
≥35 years	217,682	16.9%	2,514	14.8%
HIV status
HIV-negative or unknown	1,008,403	78.1%	12,866	75.6%
Living with HIV	282,232	21.9%	4,143	24.4%
Parity
1 or more children	762,121	59.1%	10,122	59.5%
0 children or missing	528,514	41.0%	6,887	40.5%
Occupation
Salaried	460,924	35.7%	6,262	36.8%
Other, unknown, missing	829,711	64.3%	10,747	63.2%
Education
Secondary or higher	1,194,236	92.5%	15,838	93.1%
None, primary, or missing	96,399	7.5%	1,171	6.9%
Calendar year of delivery
2014-2016	343,813	26.6%	4,929	29.0%
2017-2019	560,890	43.5%	7,846	46.1%
2020-2021	385,932	29.9%	4,234	24.9%
Marital status
Married	148,462	11.5%	1,647	9.7%
Other or missing	1,142,173	88.5%	15,362	90.3%
First weight in pregnancy
<50 kg	175,181	13.6%	2,279	13.4%
50-80kg	905,070	70.1%	11,918	70.1%
≥80kg	210,384	16.3%	2,812	16.5%
Delivery site
Urban (Gaborone or Francistown)	483,947	37.5%	7,353	43.2%
Rural (all other sites)	806,675	62.5%	9,656	56.8%
Prior preterm or stillbirth
Yes	58,368	4.5%	894	5.3%
No	731,816	56.7%	9,691	57.0%
Unknown	500,451	38.8%	6,424	37.8%
Syphilis screening result
Negative	1,075,060	83.3%	14,089	82.8%
Positive	4,293	0.3%	136	0.8%
Unknown	211,282	16.4%	2,784	16.4%