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Table 3 Knowledge about ovarian cancer and PROMISE, attitudes and intentions compared between the gist and extended decision aid groups

From: Impact of a decision aid about stratified ovarian cancer risk-management on women’s knowledge and intentions: a randomised online experimental survey study

  

Pre decision-aid

Post decision-aid

P-value for difference between groups

Response options

Gist group (n = 512)

N (%)

Extended group (n = 519)

N (%)

Gist group (n = 512)

N (%)

Extended group (n = 519)

N (%)

 

Knowledge

Summary scores

 Knowledge about ovarian cancer (range = 0–10), mean (SD)

 

5.75 (1.63)

5.66 (1.48)

6.79 (1.84)

6.76 (1.81)

t(1029) = 0.30, p = 0.766

 Knowledge about PROMISE (range = 0–6), mean (SD)

 

n/a

n/a

4.02 (1.73)

3.92 (1.70)

t(1029) = 0.87, p = 0.386

Individual item scores

Knowledge about ovarian cancer:

 The average risk of a woman developing ovarian cancer in her lifetime is (1 in 50)

1) 1 in 8

2) 1 in 50

3) 1 in 1000

141 (27.5)

280 (54.7)

91 (17.8)

144 (27.7)

256 (49.3)

119 (22.9)

117 (22.9)

347 (67.8)

48 (9.4)

105 (20.2)

346 (66.7)

68 (13.1)

 

 Ovarian cancer mostly affects older women (True)

True

Not true

Not sure

106 (20.7)

320 (62.5)

86 (16.8)

85 (16.4)

330 (63.6)

104 (20.0)

246 (48.0)

203 (39.6)

63 (12.3)

211 (40.7)

238 (45.9)

70 (13.5)

 

 Ovarian cancer can easily be found early with an ultrasound scan (Not true)

True

Not true

Not sure

238 (46.5)

89 (17.4)

185 (36.1)

233 (44.9)

85 (16.4)

201 (38.7)

211 (41.2)

124 (24.2)

177 (34.6)

210 (40.5)

147 (28.3)

162 (31.2)

 

 There are some factors which increase the risk of ovarian cancer. Please tick all that you think apply:

 Being over 50 years old (Yes)

Yes

No

222 (43.4)

290 (56.6)

213 (41.0)

306 (59.0)

340 (66.4)

172 (33.6)

322 (62.0)

197 (38.0)

 

 Being overweight (Yes)

Yes

No

270 (52.7)

242 (47.3)

285 (54.9)

234 (45.1)

342 (66.8)

170 (33.2)

356 (68.6)

163 (31.4)

 

 Smoking (Yes)

Yes

No

293 (57.2)

219 (42.8)

294 (56.6)

225 (43.4)

344 (67.2)

168 (32.8)

351 (67.6)

168 (32.4)

 

 Family history (Yes)

Yes

No

420 (82.0)

92 (18.0)

436 (84.0)

83 (16.0)

413 (80.7)

99 (19.3)

445 (85.7)

74 (14.3)

 

 Taking the pill (No)

Yes

No

197 (38.5)

315 (61.5)

197 (38.0)

322 (62.0)

150 (29.3)

362 (70.7)

162 (31.2)

357 (68.8)

 

 Having children (No)

Yes

No

67 (13.1)

445 (86.9)

58 (11.2)

461 (88.8)

53 (10.4)

459 (89.6)

50 (9.6)

469 (90.4)

 

 Breastfeeding (No)

Yes

No

9 (1.8)

503 (98.2)

16 (3.1)

503 (96.9)

12 (2.3)

500 (97.7)

16 (3.1)

503 (96.9)

 

Knowledge about PROMISE:

 Genetic testing for ovarian cancer involves giving a blood sample (True)

True

Not true

Not sure

n/a

n/a

279 (54.5)

67 (13.1)

166 (32.4)

282 (54.3)

69 (13.3)

168 (32.4)

 

 PROMISE uses genetic information to estimate the risk of developing ovarian cancer (True)

True

Not true

Not sure

n/a

n/a

360 (70.3)

29 (5.7)

123 (24.0)

357 (68.8)

21 (4.0)

141 (27.2)

 

 Learning about personal risk of ovarian cancer may affect other family members (True)

True

Not true

Not sure

n/a

n/a

383 (74.8)

43 (8.4)

86 (16.8)

392 (75.5)

56 (10.8)

71 (13.7)

 

 Most women who take part in PROMISE will learn that they are at high risk of ovarian cancer (Not true)

True

Not true

Not sure

n/a

n/a

61 (11.9)

336 (65.6)

115 (22.5)

83 (16.0)

320 (61.7)

116 (22.4)

 

 There is nothing that women who are at high risk of ovarian cancer can do to reduce their risk of ovarian cancer (Not true)

True

Not true

Not sure

n/a

n/a

53 (10.4)

337 (65.8)

122 (23.8)

56 (10.8)

313 (60.3)

150 (28.9)

 

 Women who take part in PROMISE will get some information about their risk of breast cancer (True)

True

Not true

Not sure

n/a

n/a

361 (70.5)

15 (2.9)

136 (26.6)

372 (71.7)

27 (5.2)

120 (23.1)

 

Attitudes towards taking part in PROMISE

 For me, taking part in PROMISE would be:

 A bad thing (1) not a bad thing (5)

 

n/a

n/a

3.93 (0.91)

3.89 (0.86)

 

 Not beneficial (1) beneficial (5)

 

n/a

n/a

3.89 (0.94)

3.84 (0.90)

 

 Not a good thing (1) a good thing (5)

 

n/a

n/a

3.93 (0.91)

3.89 (0.88)

 

 Not worthwhile (1) worthwhile (5)

 

n/a

n/a

3.91 (0.95)

3.88 (0.93)

 

 Not important (1) important (5)

 

n/a

n/a

3.82 (1.0)

3.82 (0.94)

 

 Harmful (1) not harmful (5)

 

n/a

n/a

4.04 (0.88)

4.03 (0.86)

 

 Total mean (range = 1–5) (SD)

 

n/a

n/a

3.92 (0.83)

3.89 (0.79)

t(1029) = 0.60, p = 0.550

Intention to participate in PROMISE

 Definitely not

 

n/a

n/a

18 (3.5%)

20 (3.9%)

 

 Probably not

 

n/a

n/a

114 (22.3%)

114 (22.0%)

 

 Yes probably

 

n/a

n/a

255 (49.8%)

267 (51.4%)

 

 Yes definitely

 

n/a

n/a

125 (24.4%)

118 (22.7%)

 

 Mean score (range = 1–4) (SD)

 

n/a

n/a

2.95 (0.78%)

2.93 (0.77%)

t(1029) = 0.43, p = 0.671

  1. Note. Correct responses are shown in bold