. 2015 Jan 17;15:10. doi: 10.1186/s12889-014-1339-0

Table 3.

Respondent perception of clinical trials (N = 1,515)

Variable	Category	Favorable feeling			Safety			Necessity
		M (SD)	t or F	p	M (SD)	t or F	p	M (SD)	t or F	p
Gender	Male	5.40 (2.34)	1.378	.168	4.70 (1.93)	−0.292	.770	7.36 (2.18)	1.677	.094
	Female	5.24 (2.28)			4.72 (1.86)			7.17 (2.12)
Age (years)	19 ~ 29	5.00 (2.23)	20.752	.004	4.57 (1.90)	5.984	.156	6.77 (2.16)^a	26.135	<.001
	30s	5.11 (2.30)			4.64 (1.85)			7.28 (2.30)^b		a < b
	40s	5.53 (2.22)			4.90 (1.81)			7.49 (1.99)^b
	50s	5.54 (2.55)			4.74 (1.95)			7.46 (2.20)^b
	≥60	5.49 (2.24)			4.61 (2.10)			7.26 (1.99)
Education	≤High School	5.37 (2.30)	6.427	.272	4.73 (1.87)	1.205	.563	7.29 (2.14)	1.113	.624
	≥ College	5.23 (2.32)			4.67 (1.95)			7.23 (2.18)
Region	Large city	5.44 (2.24)	13.682	.077	4.82 (1.97)	9.319	.075	7.00 (2.20)^a	53.033	<.001
	Small city	5.16 (2.42)			4.58 (1.86)			7.46 (2.16)^b		a < b
	Rural area	5.37 (2.16)			4.73 (1.70)			7.68 (1.75)^b
Household income	<2,000	5.24 (2.41)	8.345	.181	4.69 (1.88)	0.957	.901	7.02 (2.30)	16.105	.007
	2,000-2,999	5.43 (2.20)			4.76 (1.85)			7.37 (1.91)
	3,000-3,999	5.14 (2.24)			4.65 (2.00)			7.13 (2.24)
	≥4,000	5.39 (2.41)			4.72 (1.89)			7.44 (2.16)
Living style	Alone	5.39 (2.30)	0.301	.763	4.66 (1.69)	−0.234	.815	7.23 (2.07)	−0.153	.879
	With family	5.31 (2.31)			4.71 (1.91)			7.27 (2.16)
Awareness of CT	No	4.66 (2.33)	−6.469	<.001	4.21 (1.86)	−5.910	<.001	6.66 (2.39)	−5.901	<.001
Awareness of CT	Yes	5.54 (2.26)			4.87 (1.89)			7.47 (2.03)
Experience in CT	No	5.51 (2.26)	−2.938	.003	4.88 (1.87)	0.436	.663	7.47 (2.02)	0.834	.404
Experience in CT	Yes	6.88 (2.17)			4.71 (2.44)			7.13 (2.19)

a < b in post doc test.