Table 3. Summary of the shortlisted papers that reported an adjusted OR.

Study	Gender	Adjusted OR (95% CI)	Variables adjusted for
Kjetland et., al (2006)	Women	2.1 (1.2–3.5)	Age and BMI
Ndhlovu et., al (2007)	Women	1.4 (0.93–2.0)	Tribal origin, urban childhood and Age
Downs et., al (2011)	Women	4.0 (1.2–13.5)	Age, Gynaecological symptoms and all baseline characteristics (Marital status, number of children, people living in household, occupation, went to bed hungry, number of water contacts per day, ever treated for schistosomiasis, received artemesinin medication in past 3 years for malaria).
Downs et., al (2017)	Men	1.4 (0.6–3.3)	Age, Years of school completed, number of sexual partners in the past 6 months, dyspareunia, number of people living in household, age in years after first sex, typical sex partners more than 5 years younger, ever treated for STI, hemospermia, painful genital ulcers, syphilis.

Further meta-analysis of papers that reported adjusted OR in women was done as shown in Fig 3 below.