Table 1 Descriptive statistics overall and for women who ever achieved alignment or never achieved alignment across all menstrual cycles

Demographics

 Living with HIV, n (%)

23 (50.0%)

7 (38.9%)

31 (47.7%)

 On ART/PrEP at baseline

  Virally suppressed (< 400 copies/mL)

15 (65.3%)

6 (54.5%)

21 (67.7%)

  Initiated PrEP

23 (100%)

11 (100%)

34 (100%)

 Age, years, median (IQR)

30.8 (27.9–35.5)

29.2 (26.3–36.0)

30.1 (27.8–35.8)

 Partnership duration, years, median (IQR)

2 (2–3)

2 (1–3)

2 (1–3)

 # prior children with study partner, median (IQR)

0 (0–1)

0 (0–1)

0 (0–1)

 Time known to be discordant, years, median (IQR)

1 (0.5–3)

3 (0.25–5)

1 (0.5–4)

 Drinks alcohol, per month, n (%)

4/242 (1.7%)

0/33 (0%)

4/280 (1.4%)

 Social harm^a

7/242 (2.9%)

2/33 (0.6%)

10/280 (3.6%)

 STI diagnosis^b

6/242 (2.5%)

0/33 (0%)

6/280 (2.1%)

Overall sexual activity

 # condomless sex acts per SMS reports, n (%)

877/6042 (14.5%)

29/865 (3.3%)

906/6929 (13.1%)

 Median (IQR) condomless sex acts

11 (5–23)

1 (0–2)

7 (2–14)

 # condomless sex acts during peak fertility per SMS report, n (%)

225/822 (27.4%)

0/103 (0%)

225/925 (24.3%)

 Median (IQR) condomless sex acts during peak fertility

3 (1–7)

0 (0–0)

2 (0–4)