Table 3 Primary and secondary outcomes

 Under-five mortality rate

The number of confirmed* deaths amongst children aged 7 days–59 months, per 1000 livebirths reported by women in the cohort, in the last 12 months

Secondary outcomes

 Suspected pneumonia mortality rate

The number of confirmed* deaths classified by InterVA-5 as primarily attributable to acute respiratory infections amongst children aged 7 days–59 months, per 1000 livebirths reported by women in the cohort, in the last 12 months [21]

 Pneumonia point prevalence

The proportion of children clinically assessed on the day of the survey who meet 2014 WHO IMCI definition for pneumonia or severe pneumonia, including hypoxemia [22, 46]

 Women’s wellbeing

The mean Short Warwick-Edinburgh Mental Wellbeing Scale score amongst women aged 16–49 years [23]

Treat

 Knowledge of pneumonia

The proportion of women aged 16–49 who can name both fast and difficulty breathing as signs of pneumonia

 Care-seeking for childhood illnesses

The proportion of caregivers who self-reported visiting a formal healthcare provider (including primary, secondary, private or government facilities) within 48 h of illness recognition, amongst those who reported their child has been sick in the previous 2 weeks

Protect

 Exclusive breastfeeding

The proportion of children aged 0–6 months whose caregiver self-reports exclusively breastfeeding

 Vitamin A

The proportion of children aged 18–59 months with 2 doses of vitamin A

Prevent

 Vaccine coverage

The proportion of children aged 18–59 months with complete vaccine coverage according to the Nigerian Childhood Vaccination programme [24]**

 Handwashing with soap

The proportion of households who self-report access to soap and water in their home for handwashing

 Household air pollution

The proportion of households who self-report cooking indoors with wood/charcoal or dried grass