Table 1 Summary of definitions and measure used in the study

 Age

<  20; 20–29; 30–39; ≥ 40 years

 Educational level

≤ 6 years; 6–12; >  12 years

 Occupation

unemployed; unskilled; semi-skilled; skilled

 Socioeconomic class

Low; middle; high

 Religion

Christianity; Islam; traditional; others

 Tribe

Igbo; Hausa; Yoruba; others

 Marital status

Married; single

 Spouse age

<  30 years; 30–39 years; 40–49; ≥ 50 years

 Spouse education

≤ 6 years; 6–12; >  12 years

 Ever heard of DBM^a

Yes; no

 Knowledge of the concept of DBM

None; partial; adequate

 Awareness of policy on DBM

Yes; no

 Willingness to donate/receive DBM

Yes; no

 Requirement monetary remuneration

Yes; no

 Requirement of spousal consent

Yes; no

 Milk preference in medical condition

Donor breast milk; infant formulas

 Will recommendation DBM

Yes; no