Table 1. Cognitive outcomes to be measured, including the primary outcome (MPI) and secondary outcomes.

MPI, mental processing index; KABC-II, Kaufman Assessment Battery for Children 2 ^nd edition.

	MARKER	MEASURE	OUTCOMES	RATIONALE
Cognitive Function (120 mins including KABC-II)	Kaufman Assessment Battery for Children	Cognitive processing	Primary outcome: Mental processing index (MPI)	Overall measure of cognitive function
			Secondary outcomes: KABC-II domain scores, individual subtest scores	Short & long-term memory, planning, problem-solving, sequential memory
	School Achievement Test	Academic	Total score, Subtest scores ( numeracy, reading, writing)	Literacy & numeracy
	Fine motor	Shortest time to complete finger tapping sequence	Time for dominant hand, non- dominant hand, and average between both hands,	Fine motor
	Plus-EF Tablet test	Executive Function	Overall score, individual subtest scores, reaction time	Executive function
	Child socio-emotional questionnaire	Home support	Total score, sub-score removing food insecurity question	Child’s own perspective on home support
	Washington Group Child function module (asked in caregiver questionnaire)	Disability screening, including vision and hearing	Overall score, disability, learning, mental health subscale	Child functional abilities
	Strength and Difficulties Questionnaire (SDQ, asked in caregiver questionnaire)	Socioemotional function	SDQ total score and subtest scores	Behaviour