Long-term efficacy of a Web-based computer-tailored nutrition education intervention for adults including cognitive and environmental feedback: a randomized controlled trial

Table 3 Results general linear mixed models for primary outcome measures

							P-value	B [95% CI]^a	ES^b
Fruit intake
	Type III tests total sample (n = 1349)
		Group x time x education^c					.52	–
		Group x time^d					.50	–
		Time^e					<.001^*	–
	Type III tests risk group (n = 803)
		Group x time x education^c					.24	–
		Group x time^d					.17	–
		Time^e					<.001^*	–
Vegetable intake
	Type III tests total sample (n = 1349)
		Group x time x education^c					.02^*	–
			Low/moderate-educated participants (n = 733)
				Group x time^d			.003^*	–
				Time^e			.07	–
					Differences over time between groups for low/moderate-educated participants
						Basic vs. control^d	.001^*	22.09 [9.25, 34.93]	0.32
						Plus vs. control^d	.25	7.23 [−5.19, 19.64]	0.11
						Plus vs. basic^d	.03^*	−14.87 [−28.20, −1.54]	0.22
			High-educated participants (n = 616)
				Group x time^d			.25	–
				Time^e			.052	–
	Type III tests risk group (n = 1014)
		Group x time x education^c					.03^*	–
			Low/moderate-educated participants (n = 576)
				Group x time^d			.07	–
				Time^e			<.001^*	–
			High-educated participants (n = 438)
				Group x time^d			.23	–
				Time^e			<.001^*	–
High-energy snack intake ^f
	Type III tests total sample (n = 1349)
		Group x time x education^c					.71	–
		Group x time^d					.14	–
		Time^e					<.001^*	–
	Type III tests risk group (n = 808)
		Group x time x education^c					73	–
		Group x time^d					.13	–
		Time^e					<.001^*	–
Fat intake
	Type III tests total sample (n = 1349)
		Group x time x education^c					.82	–
		Group x time^d					.13	–
		Time^e					<.001^*	–
	Type III tests risk group (n = 627)
		Group x time x education^c					.71	–
		Group x time^d					.60	–
		Time^e					<.001^*	–

^aB = Unstandardized regression coefficient for difference between groups in change over time; ^bES = Effect size; ^cBased on linear mixed model including place of residence, age, education, study group, time, ‘group X time’, ‘time X education’, ‘group X education’ and ‘group X time X education’; ^dBased on linear mixed model including place of residence, age, education, study group, time, ‘group X time’; ^e Based on linear mixed model including place of residence, age, education, study group, time; ^fRepeated measures analyses on natural logarithm of high-energy snacks, estimates based on original variable; ^*Significant at p ≤ .05.

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