Table 1.

Descriptive statistics of the samples of Year 5 and 6 students aged 9–11 years participating in the cluster-randomised controlled trial of the Welsh Government’s Primary School Free Breakfast Initiative

	Whole sample (follow-up only)				Cohort (n 1216)
	Baseline (n 3093)		Follow-up (n 3055)		Baseline		Follow-up
	n or median	% or IQR	n or median	% or IQR	n or median	% or IQR	n or median	% or IQR
FSM entitlement*	674	21·8	706	23·1	263§		21·6||
Girls	1571	50·8	1511	49·5	643		52·9
Ate two breakfasts in 2 d	2459	79·5	2506	82·0	984	80·9	988	81·3
No. of healthy items for breakfast†	3	2–4	4	2–5	3	2–4	2	3–5
At least one ‘unhealthy’ breakfast item	666	21·5	552	18·1	264	21·7	224	18·4
At least one fruit or vegetable (rest of day)	1404	45·4	1512	49·5	521	42·8	570	47·4
At least one sweet or crisp item (rest of day)	2102	68·0	1957	64·1	804	66·1	793	70·0
English (% scoring 4 or 5)‡	2433	78·6	2401	78·6	987		80·8
Maths (% scoring 4 or 5)‡	2489	80·4	2444	80·0	993		81·7
Science (% scoring 4 or 5)‡	2683	86·7	2628	86·0	1081		88·5

^*FSM entitlement refers to those students from low-income families who are, therefore, eligible to receive free school meals at lunchtime.

^†Data are presented as median and interquartile range (IQR).

^‡In 2005, when this trial was conducted, students were assessed in English, Maths and Science and graded with levels 1–6.

^§Data (all such values) are numbers.

^||Data (all such values) are percentages.