Table 2.

Baseline demographic and psychological characteristics of the four study groups (n = 2140)

		Intervention group				Control group 1 n = 717		Control group 2 n = 712		p value
		Matched message n = 356		Unmatched message n = 355
		Mean/ratio	SD	Mean/ratio	SD	Mean/ratio	SD	Mean/ratio	SD
Intention (scale: 1–3)		2.04	0.59	2.07	0.57	2.03	0.60	2.05	0.59	0.786
Cancer worry (scale: 1–4)		2.52	0.72	2.54	0.75	2.54	0.75	2.53	0.74	0.964
Age	40s	4.8 %	–	4.6 %	–	4.9 %	–	6.1 %	–	0.859
	50s	25.4 %	–	22.3 %	–	24.4 %	–	24.3 %	–
	60s	69.9 %	–	73.1 %	–	70.7 %	–	69.7 %	–
Sex	Male	44.2 %	–	39.3 %	–	42.7 %	–	41.5 %	–	0.574
	Female	55.8 %	–	60.7 %	–	57.3 %	–	58.5 %	–
Marital status	Married	73.9 %	–	70.2 %	–	68.7 %	–	71.8 %	–	0.315
	Unmarried	26.1 %	–	29.8 %	–	31.3 %	–	28.2 %	–
Education level (scale: 1–5)		2.34	0.99	2.26	0.93	2.33	0.93	2.30	0.91	0.599
Subjective economic status (scale: 1–5)		2.57	0.86	2.66	0.89	2.58	0.89	2.66	0.87	0.258