Table 4

Summary of results of usability analysis.

Average time task one (minutes)

Average time task two (minutes)

Difference average time task one and two

Average SUS

Sample

3.27 (0.47–8)

0.83 (0.1–2)

2.44

68.50 (35–97.5)

User group

Clinics

3.24 (1.6–5)

1.16 (0.8 – 1.5)

2.09

64.64 (55–72.5)

Community

5.63 (2.5–8)

1.23 (0.9–2)

4.40

46.88 (35–75)

Convenience

1.83 (0.47–3)

0.32 (0.1–1.12)

1.51

78.75 (45–97.5)

Municipality

3.83 (2–6)

0.95 (0.45–1.6)

2.89

69.72 (62.5–85)

Level of computer use

Coding

2.92 (1.16–5)

0.75 (0.1–1)

2.17

66.88 (35–95)

Internet

2.93 (0.47–5)

0.63 (0.15–1.4)

2.30

72.06 (45–97.5)

Word-processing

4.07 (1.6–8)

1.23 (0.45–2)

2.84

62.50 (35–72.5)

Education level

High school

4.90 (2–8)

1.33 (1–2)

3.58

56.50 (35–72.5)

Tertiary

2.94 (0.47–6)

0.73 (0.1–1.6)

2.22

70.90 (35–97.5)

Gender

Female

2.95 (0.47–7)

0.87 (0.1–2)

2.08

66.53 (35–97.5)

Male

3.75 (0.5–8)

0.76 (0.2–1.6)

2.99

71.46 (42.5–92.5)

Age

20–29

2.52 (0.47–8)

0.39 (0.1–1)

2.13

72.75 (42.5–95)

30–39

4.29 (1.6–7)

1.21 (0.25–2)

3.08

67.50 (35–97.5)

40–49

3.51 (1.6–5)

1.02 (0.45–1.5)

2.49

64.50 (35–75)

50–59

3.00 (2–5)

0.88 (0.5–1)

2.13

69.38 (55–85)

The table shows the average time taken to complete task one and task two, the difference in the average time taken to complete task one and two and the average SUS. The range (minimum and maximum) of these indicators is shown between brackets.

Vanmeulebrouk et al. International Journal of Health Geographics 2008 7:53   doi:10.1186/1476-072X-7-53