Anaemia is a common health problem in women. It is often due to iron deficiency. Anaemia is a particular problem during pregnancy and is bad for the mother and baby. It is best to treat anaemia in young women well before they get pregnant. Doctors treat anaemia with iron and vitamins. But some people get side effects when taking iron tablets and so they stop taking them. Heavy menstrual periods are a common cause of iron deficiency and even if women do take iron, because they lose so much iron in their periods, they still become iron deficient. Tranexamic acid (TXA) is a medicine used to treat heavy periods. The investigators of this study would like to find out if taking TXA with the usual iron and vitamin supplements is better at treating anaemia than taking iron and vitamin supplements alone. (Lay Summary)
World-wide, half a billion women of reproductive age are anaemic. Anaemia has major health consequences for pregnant women and their babies. Anaemia increases the risk of ante-partum haemorrhage, prematurity, stillbirth, neonatal death, post-partum haemorrhage and maternal death. Early intervention to reduce the risk of anaemia before pregnancy offers the potential to reduce adverse maternal and birth outcomes and improve well-being across the reproductive life course. Unfortunately, global efforts to reduce anaemia prevalence by 2025 are far off track. Anaemia worsens bleeding through multiple biological mechanisms. Anaemia increases blood flow from bleeding vessels due to reduced blood viscosity and anaemic blood clots are more susceptible to fibrinolysis. Although iron and multivitamin replacement is the mainstay of anaemia treatment, iron stores in young women depend more on menstrual iron loss than on dietary intake. Because anaemia worsens bleeding, women with anaemia have heavier menstrual periods than if they were not anaemic. For this reason, offering iron replacement without reducing menstrual iron loss may be inefficient. The antifibrinolytic tranexamic acid (TXA) reduces menstrual bleeding by preventing blood clot breakdown. The investigators propose that giving TXA with iron and vitamin replacement will be more effective in treating anaemia than iron and vitamin replacement alone.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
4,000
Tablets
Matched placebo tablets (inactive ingredients only, including microcrystalline cellulose, magnesium stearate BP and lactose)
Anaemia
The proportion of participants with anaemia, defined as Haemoglobin (Hb) \< 120 g/L (measured on venous blood)
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Haemoglobin (Hb) concentration
Hb measured on venous blood
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Severity of anaemia
Mild Anaemia (Hb=110-119 g/L); Moderate Anaemia (Hb=80-109 g/L); Severe Anaemia (Hb \< 80 g/L); Hb measured on venous blood
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Ferritin
Serum ferritin (from venous blood sample) and CRP-adjusted ferritin (see below, under C-reactive protein)
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Iron deficiency
Iron deficiency defined as ferritin \<15 ug/L (WHO definition) and defined as ferritin \<30 ug/L, (new clinical consensus); Serum ferritin from venous blood sample; CRP-adjusted ferritin (see below, under C-reactive protein) Note: CRP-adjusted ferritin (see below)
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
C-reactive protein (CRP)
The Statistical Analysis Plan (SAP) will include details on how ferritin values will be corrected by taking into account CRP levels (inflammation marker), because normal ferritin concentrations may mask an iron deficient state if inflammation is present
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Iron-deficiency anaemia
The proportion of participants with iron-deficiency anaemia, defined as presence of both anaemia (Hb\<120 g/L) plus iron deficiency (ferritin \<15 ug/L AND/OR \<30 ug/L), measured as detailed above (using CRP-adjusted ferritin levels, as explained above)
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Menstrual blood loss
Blood loss assessed semi-quantitatively by pictorial blood assessment chart (PBAC), adapted from Higham et al (1990), DOI: 10.1111/j.1471-0528.1990.tb16249.x
Time frame: During 3 menstrual periods (on average about 3 months, but no longer than 6 months from baseline)
Perceived change in menstrual blood loss
Participant's subjective assessment of change in menstrual bleeding from baseline, e.g. expressed on a Likert scale ('greatly improved' to 'much worse')
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Degree of effect of menstrual bleeding on health-related Quality of Life
SAMANTA scale (ref: Calaf, 2020, DOI: 10.1089/jwh.2018.7446 and Sinharoy 2023, DOI: 10.1016/S2214-109X(23)00416-3; Affirmative answers to two questions ('experiencing menstrual bleeding for \>7 days per month' and 'being bothered by menstruation due to its Abundance') each receive 3 points, while affirmative answers to all other questions each receive 1 point ('≥3 days of heavier bleeding', 'blood spotting on clothes at night', 'worried about staining furniture', 'avoid some activities because of the need to change menstrual materials'). These values are summed, resulting in a potential range of values for the heavy menstrual bleeding score from 0 to 10.)
Time frame: After the 3rd and before the 4th menstrual period or by 6 months from baseline, whichever occurs first.
Flooding
'Flooding' experienced during menstrual period (provisionally defined by Cooper 2013, DOI: 10.1111/1471-0528.17473, as "sudden overwhelming blood loss that exceeds the saturation of the menstrual products being used")
Time frame: During 3 menstrual periods (on average about 3 months, but no longer than 6 months from baseline)
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