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. 2020 Mar 2;8(3):e16279. doi: 10.2196/16279

Table 1.

Diagnostic decision after online search.

Diagnostic step (correct or wrong)		Google (N=50)	Free choice (N=44)	Medisuch (N=46)	Chi-square (df)
Antibody detection (wrong)
	yes	2 (4%)	1 (2%)	7 (15%)	6.84 (2), P=.03
	no	48 (96%)	43 (98%)	39 (85%)	6.84 (2), P=.03
Histamine testing (wrong)
	yes	19 (38%)	15 (34%)	13 (28%)	1.03 (2),P=.60
	no	31 (62%)	29 (66%)	33 (72%)	1.03 (2),P=.60
Assessment of diaminoxydase (wrong)
	yes	29 (58%)	23 (52%)	18 (39%)	3.55 (2),P=.17
	no	21 (42%)	21 (48%)	28 (61%)	3.55 (2),P=.17
H₂ breathing test (wrong)
	yes	0 (0%)	0 (0%)	0 (0%)	N/A^a
	no	50 (100%)	44 (100%)	46 (100%)	N/A^a
Test of urine and feces (wrong)
	yes	7 (14%)	4 (9%)	7 (15 %)	0.84 (2),P=.66
	no	43 (86%)	40 (91%)	39 (85%)	0.84 (2),P=.66
Nutrition diary (correct)
	yes	30 (60%)	27 (61%)	28 (61%)	0.02 (2),P=.99
	no	20 (40%)	17 (39%)	18 (39%)	0.02 (2),P=.99
Elimination diet (correct)
	yes	26 (52%)	19 (43%)	33 (72%)	7.87 (2),P=.02
	no	24 (48%)	25 (57%)	13 (28%)	7.87 (2),P=.02
Provocation test (correct)
	yes	25 (50%)	21 (48%)	22 (48%)	0.06 (2),P=.97
	no	25 (50%)	23 (52%)	24 (52%)	0.06 (2),P=.97

^aNot applicable.