TABLE 3.

Per protocol analyses for blood and cognitive outcomes in Rwandan female college students randomly assigned to conventional or iron-biofortified beans for 18 wk¹

	Baseline effect			Group effect
Variables by outcome	F	MSE		F	MSE
Blood
Hemoglobin	578.3***	215	0.80	12.7***	5	0.08
Ferritin	119.1***	16	0.45	8.5**	1	0.06
Transferrin receptor	237.9***	830	0.63	0.1	0	0.00
Body iron2	278.4***	650	0.66	7.5**	18	0.05
SRT task RT	17.9***	21,812	0.11	0.0	5	0.00
GNG task RT	64.0***	100,546	0.31	1.4	2227	0.01
ANT RT
0 Cues	79.8***	229,369	0.36	0.0	61	0.00
2 Cues	53.3***	212,450	0.28	0.6	2327	0.00
Alerting	5.5*	11,944	0.04	0.0	37	0.00
Center cue	78.6***	246,784	0.36	0.2	603	0.00
Spatial cues	64.3***	194,872	0.31	3.6+	10,828	0.02
Orienting	0.1	220	0.00	9.9**	19,353	0.07
Consistent flankers	92.1***	278,638	0.40	0.1	347	0.00
Inconsistent flankers	105.8***	297,102	0.43	0.3	703	0.00
Conflict	12.0***	27,639	0.08	0.0	59	0.00
CRT
Sensitivity (d′)	2.6	1	0.02	15.1***	6	0.09
PCC	3.8+	9599	0.03	10.3**	26,278	0.07
RT
New items	32.8***	487,279	0.18	16.6***	247,301	0.11
Old items	28.0***	294,491	0.17	27.4***	288,113	0.16
Bias (c)	1.1	0	0.01	24.4***	2	0.14
SMS task RT
Intercept
New	5.2*	72,774	0.04	19.7***	275,685	0.12
Old	27.5***	502,669	0.16	15.6***	284,449	0.09
Slope
New	3.6+	1092	0.03	42.6***	12,779	0.23
Old	1.3	966	0.01	20.5***	15,594	0.13

¹Assessed using a generalized linear model regressing endline on group, controlling for baseline. ⁺P < 0.1; *P < 0.05; **P < 0.01; ***P < 0.001. ANT, attentional network task; CRT, cued recognition task; GNG, go/no-go; MSE, mean SE; PCC, percentage change in capacity; RT, reaction time; SMS, Sternberg memory search; SRT, simple reaction time; , proportion of variance accounted for.

²Calculated using Cook’s equation (26).