Table 2.

Absolute (n) and relative (%) frequencies of DISCERN single items results; in the last row, distribution of the DISCERN total score of web pages devoted to UV protection for skin cancer prevention for the search queries A, B, C, and D, respectively (definition of search query A to D, see Methods). Q1, first quartile; Q3, third quartile.

Criterion		A: n (%)	B: n (%)	C: n (%)	D: n (%)
Defined objectives	Yes	97 (95.1)	112 (93.3)	47 (58)	56 (43.8)
	Partly	5 (4.9)	7 (5.8)	24 (29.6)	30 (23.4)
	No	0 (0)	1 (0.8)	10 (12.3)	42 (32.8)
Defined objectives have been met	Yes	82 (80.4)	93 (78.2)	38 (53.5)	50 (58.1)
	Partly	17 (16.7)	25 (21)	31 (43.7)	35 (40.7)
	No	3 (2.9)	1 (0.8)	2 (2.8)	1 (1.2)
Significant publication	Yes	58 (56.9)	70 (58.3)	51 (63)	72 (56.2)
	Partly	36 (35.3)	34 (28.3)	24 (29.6)	46 (35.9)
	No	8 (7.8)	16 (13.3)	6 (7.4)	10 (7.8)
Transparent information sources	Yes	12 (11.8)	9 (7.5)	8 (9.9)	12 (9.4)
	Partly	17 (16.7)	22 (18.3)	13 (16)	8 (6.2)
	No	73 (71.6)	89 (74.2)	60 (74.1)	108 (84.4)
Indication of date of publication	Yes	4 (3.9)	3 (2.5)	2 (2.5)	3 (2.3)
	Partly	59 (57.8)	82 (68.3)	38 (46.9)	75 (58.6)
	No	39 (38.2)	35 (29.2)	41 (50.6)	50 (39.1)
Well-balanced and objective presentation	Yes	90 (88.2)	114 (95)	73 (90.1)	115 (89.8)
	Partly	12 (11.8)	6 (5)	8 (9.9)	12 (9.4)
	No	0 (0)	0 (0)	0 (0)	1 (0.8)
Detailed information on supplemental help and further information	Yes	7 (6.9)	5 (4.2)	4 (4.9)	2 (1.6)
	Partly	10 (9.8)	6 (5)	9 (11.1)	3 (2.3)
	No	85 (83.3)	109 (90.8)	68 (84)	123 (96.1)
Areas of uncertainty have been mentioned	Yes	7 (6.9)	13 (10.8)	5 (6.2)	0 (0)
	Partly	6 (5.9)	10 (8.3)	4 (4.9)	1 (0.8)
	No	89 (87.3)	97 (80.8)	72 (88.9)	127 (99.2)
DISCERN total Median (Q1–Q3)		16.5 (15–17)	16 (15.5–18)	16 (14–17)	15 (14–16)