Table 3. Relationship between classification of socio-economic position and questionnaire delivery mode for each socio-economic domain.
% in each SEP category | p-value | OR [95% CI]7 | ||||||||||
Socio-economic position (SEP) | IAQ1 | SAQ2 | AudioSAQ3 | ACASI4 | IAQ1 | SAQ2 | AudioSAQ3 | ACASI4 | ||||
Asset wealth score (n): | 360 | 360 | 371 | 375 | 1.00 | 0.73 [0.56–0.95] | 0.94 [0.72–1.23] | 0.84 [0.64–1.09] | ||||
SEP 1 (Poorest - score 0.0–0.46) | 35.0 | 43.6 | 38.8 | 43.7 | ||||||||
SEP 2 (Score 0.47–0.62) | 35.8 | 32.8 | 30.7 | 25.6 | ||||||||
SEP 3 (Score 0.63–1.0) | 29.2 | 23.6 | 30.5 | 30.7 | p = 0.016 5 | |||||||
Mean score [SD] | 0.55 [0.17] | 0.52 [0.21] | 0.55 [0.20] | 0.54 [0.21] | p = 0.218 6 | |||||||
Ability to afford essential items (n): | 364 | 368 | 376 | 375 | 1.00 | 0.53 [0.40–0.69] | 0.68 [0.52–0.88] | 0.68 [0.52–0.89] | ||||
SEP 1 (Poorest - score 0.0–0.43) | 33.5 | 50.3 | 43.4 | 45.3 | ||||||||
SEP 2 (Score 0.44–0.71] | 36.0 | 29.9 | 33.5 | 28.8 | ||||||||
SEP 3 (Score 0.72–1.00) | 30.5 | 19.8 | 23.1 | 25.9 | p<0.001 5 | |||||||
Mean score [SD] | 0.60 [0.28] | 0.49 [0.30] | 0.53 [0.29] | 0.53 [0.30] | p<0.001 6 | |||||||
Food sufficiency (n): | 363 | 359 | 368 | 375 | ||||||||
Insufficient food | 35.0 | 50.1 | 48.1 | 46.9 | p<0.001 5 | 1.00 | 1.87 [1.39–2.52] | 1.72 [1.28–2.32] | 1.64 [1.22–2.21] |
IAQ = Interviewer administered questionnaire;
SAQ = Self-administered questionnaire;
AudioSAQ = Audio self-administered questionnaire;
ACASI = Audio-computer assisted self-interview.
Chi-square test;
Oneway analysis of variance F-test;
Crude odds ratio calculated using ordinal logistic regression for asset wealth and essential item SEP scores.