Table 3.

Summary of previous experience of breast cancer screening by group.

Screening			App (N=60), n (%)	Brochure (N=60), n (%)	All (N=120), n (%)	Group difference
						χ2 (degrees of freedom)	P value
BSEa
	Awareness
		Yes	54 (90)	57 (95)	111 (92.5)	.b (1)	.49
		No	6 (10)	3 (5)	9 (7.5)
	Procedure knowledge
		Yes	48 (80)	50 (83)	98 (81.7)	0.2 (1)	.64
		No	12 (20)	10 (17)	22 (18.3)
	Previous performance
		Yes	49 (82)	45 (75)	94 (78.3)	0.8 (1)	.38
		No	11 (18)	15 (25)	26 (21.7)
	Years since the last performance, mean (SDc)		1.04 (2.24)	0.78 (1.28)	0.91 (1.83)	−1.15 (90)d	.25
CBEe
	Awareness
		Yes	34 (57)	35 (58)	69 (57.5)	0.0 (1)	.85
		No	26 (43)	25 (42)	51 (42.5)
	Procedure knowledge
		Yes	29 (48)	35 (58)	64 (53.3)	1.2 (1)	.27
		No	31 (52)	25 (42)	56 (46.7)
	Previous receipt
		Yes	37 (62)	37 (62)	74 (61.7)	0.0 (1)	>.99
		No	23 (38)	23 (38)	46 (38.3)
	Years since the last receipt, mean (SD)		4.22 (4.22)	2.97 (3.86)	3.59 (4.06)	−1.51 (72)d	.13
Mammography
	Awareness
		Yes	47 (78)	46 (77)	93 (77.5)	0.1 (1)	.83
		No	13 (22)	14 (23)	27 (22.5)
	Procedure knowledge
		Yes	45 (75)	46 (77)	91 (75.8)	0.1 (1)	.83
		No	15 (25)	14 (23)	29 (24.2)
	Previous receipt
		Yes	44 (73)	40 (67)	84 (70.0)	0.6 (1)	.43
		No	16 (27)	20 (33)	36 (30.0)
	Years since the last receipt, mean (SD)		4.23 (3.15)	4.38 (4.89)	4.30 (4.05)	−0.02 (82)d	.98

^aBSE: breast self-examination.

^bDot signifies that no numeric value is available. Instead of Pearson chi-square test, Fisher exact test was performed, given that the expected count for some cells is less than 5. In the Statistical Package for the Social Sciences (SPSS) software, only the P value of the Fisher exact test is reported rather than the test statistic.

^cSD: standard deviation.

^dSignifies t (degrees of freedom).

^eCBE: clinical breast examination.