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Table 8 Item non-response by mode (Odds ratio, 95% CI)

From: A randomised trial and economic evaluation of the effect of response mode on response rate, response bias, and item non-response in a survey of doctors

  Job Satisfaction DCE Work Places Workload Finances Location About You Family Total
Average Percentage of items completed 1          
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 completed 2          
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. 1. Mean proportion of questions completed. A generalised linear model controlling for age, gender, doctor type and rurality.
  2. 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