Table 8

Item non-response by mode (Odds ratio, 95% CI)

Job Satisfaction

DCE

Work Places

Workload

Finances

Location

About You

Family

Total


Average Percentage of items completed1

Simultaneous mixed (compared to online)

2.85

1.10

1.14

1.52

1.48

1.46

2.67**

3.08**

1.48*

[0.86,9.42]

[0.42,2.88]

[0.83,1.55]

[0.92,2.53]

[0.94,2.33]

[0.98,2.18]

[1.42,5.00]

[1.32,7.20]

[1.03,2.14]

Sequential mixed (compared to online)

2.53

3.83*

1.31

1.70*

1.41

1.55*

1.68

1.87

1.53*

[0.81,7.91]

[1.14,12.95]

[0.97,1.76]

[1.05,2.76]

[0.90,2.20]

[1.02,2.37]

[0.96,2.94]

[0.87,4.03]

[1.09,2.17]


N

476

476

476

476

476

476

476

476

476.

Log likelihood

-18.397

-63.804

-149.636

-129.201

-169.354

-106.841

-105.201

-63.197

-107.395


Whether 100% of items were completed2

Simultaneous mixed (compared to online)

0.95

0.96

0.95

0.67

0.98

0.77

1.75

3.25**

0.13*

[0.42,2.11]

[0.42,2.19]

[0.53,1.72]

[0.40,1.11]

[0.60,1.59]

[0.48,1.24]

[0.98,3.12]

[1.38,7.65]

[0.02,0.67]

Sequential mixed (compared to online)

0.82

2.64

0.99

0.76

0.84

0.85

1.10

1.86

0.23*

[0.37,1.81]

[0.97,7.21]

[0.55,1.78]

[0.46,1.26]

[0.51,1.38]

[0.53,1.36]

[0.64,1.87]

[0.90,3.82]

[0.07,0.78]


N

476

476

459

476

476

476

476

476

459

Log likelihood

-156.70

-112.68

-237.51

0.67

-310.12

-320.57

-253.63

-134.05

-51.28


1. Mean proportion of questions completed. A generalised linear model controlling for age, gender, doctor type and rurality.

2. Whether a respondent completed all questions (= 1). Logistic regression model controlling for age, gender, doctor type and rurality * P < 0.05, ** P < 0.01, *** P < 0.001

Scott et al. BMC Medical Research Methodology 2011 11:126   doi:10.1186/1471-2288-11-126

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