Skip to main content

Table 1 Baseline characteristics

From: Does a monetary incentive improve the response to a postal questionnaire in a randomised controlled trial? The MINT incentive study

 

Incentive

n = 1070 (%)

No incentive

n = 1074 (%)

Centre of recruitment to MINT

  

   Hospital A

102 (9.5)

104 (9.7)

   Hospital B

51 (4.8)

46 (4.3)

   Hospital C

156 (14.6)

188 (17.5)

   Hospital D

42 (3.9)

36 (3.4)

   Hospital E

61 (5.7)

78 (7.3)

   Hospital F

54 (5.0)

53 (4.9)

   Hospital G

69 (6.4)

64 (6.0)

   Hospital H

98 (9.2)

90 (8.4)

   Hospital I

62 (5.8)

55 (5.1)

   Hospital J

21 (2.0)

22 (2.0)

   Hospital K

130 (12.1)

112 (10.4)

   Hospital L

53 (5.0)

49 (4.6)

   Hospital M

22 (2.1)

23 (2.1)

   Hospital N

80 (7.5)

82 (7.6)

   Hospital O

69 (6.4)

72 (6.7)

Time point of recruitment

  

   4 month questionnaire

590 (55.1)

604 (56.2)

   8 month questionnaire

480 (44.9)

470 (43.8)

Age, years; mean [sd]

37.0 [13.4]

36.8 [13.2]

   range

18–87

18–78

Sex male

448 (41.9)

456 (42.5)

   Female

613 (57.3)

606 (56.4)

   Missing

9 (0.7)

12 (1.1)

WAD grade at ED assessment

  

   I

572 (53.5)

617 (57.4)

   II

465 (43.5)

429 (39.9)

   III

33 (3.1)

28 (2.6)