Table 4.

Marginal means and 95 % CI for confusion, nutritional backlash and intentions, by condition, in the analytic sample (n 901) of Amazon Mechanical Turk workers aged >18 years, USA, February 2018

		Confusion	Nutritional backlash	Intentions low-carbohydrate	Intentions low-fat
Contradictory	Mean	3·15	2·93	2·56	2·43
	95 % CI	3·05, 3·25	2·86, 3·00	2·44, 2·69	2·30, 2·56
Convergent condition 1   (low-carbohydrate)	Mean	2·64	2·80	2·33	2·58
	95 % CI	2·49, 2·78	2·70, 2·90	2·15, 2·50	2·38, 2·77
Convergent condition 2   (low-fat)	Mean	2·85	2·88	2·62	2·05
	95 % CI	2·70, 3·00	2·78, 3·00	2·45, 2·80	1·86, 2·24
Control condition 1   (established)	Mean	2·17	2·50	2·81	2·84
	95 % CI	2·03, 2·32	2·40, 2·60	2·64, 3·00	2·65, 3·04
Control condition 2   (no exposure)	Mean	2·45	2·63	2·84	2·93
	95 % CI	2·32, 2·58	2·54, 2·73	2·67, 3·00	2·76, 3·11

Confusion, nutritional backlash, intentions low-carbohydrate and intentions low-fat were measured on a scale of 1–5. These means were adjusted for two variables (having been on a low-carbohydrate diet in the past 12 months and having been on an ‘other’ diet type in the past 12 months) that differed between randomized conditions.