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Table 1 Characteristics of the women included in the study. Intention-to-treat analysis

From: Effect of an information leaflet on breast cancer screening participation: A cluster randomized controlled trial

 

Hospital A

Hospital B

Total

Intervention Group

Control Group

Intervention Group

Control Group

Intervention Group

Control Group

n

%

n

%

n

%

n

%

n

%

n

%

Age (median and IQR)

57

53–62

57

53–62

58

54–63

58

54–63

58

53–63

58

54–63

Place of birth

 Spain

1460

56.8%

1418

56.2%

1956

69.3%

2203

69.5%

3416

63.3%

3621

63.6%

 Europe or North America

143

5.6%

174

6.9%

108

3.8%

107

3.4%

251

4.7%

281

4.9%

 Center or South America

301

11.7%

292

11.6%

220

7.8%

261

8.2%

521

9.7%

553

9.7%

 Asia or Oceania

515

20.0%

448

17.8%

33

1.2%

42

1.3%

548

10.2%

490

8.6%

 Africa

96

3.7%

150

5.9%

12

0.4%

14

0.4%

108

2.0%

164

2.9%

Missing

55

2.1%

40

1.6%

494

17.5%

545

17.2%

549

10.2%

585

10.3%

Study level

 Primary or less

633

24.6%

667

26.4%

118

4.2%

144

4.5%

751

13.9%

811

14.2%

 High-school or PT

1098

42.7%

1046

41.5%

1543

54.7%

1767

55.7%

2641

49.0%

2813

49.4%

 Higher level

398

15.5%

419

16.6%

997

35.3%

1066

33.6%

1395

25.9%

1485

26.1%

Missing

441

17.2%

390

15.5%

165

5.8%

195

6.1%

606

11.2%

585

10.3%

Initial or subsequent screening

 Initial screening

1188

46.2%

1151

45.6%

2101

74.4%

2306

72.7%

3289

61.0%

3457

60.7%

 Subsequent screening

1381

53.7%

1371

54.4%

722

25.6%

866

27.3%

2103

39.0%

2237

39.3%

Missing

1

0.0%

0

0.0%

0

0.0%

0

0.0%

1

0.0%

0

0.0%

Total

2570

100%

2522

100%

2823

100%

3172

100%

5393

100%

5694

100%

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