Table 2

Methodological characteristics of included studies
Author/Year Sampling methods Data collection Data analysis
Cranston, 1980 [29] Non-probability Questionnaire (24-item Likert scale) One-way ANOVA, mean, standard deviations and frequency counts
Dover and Gauge, 1995 [14] Non-probability Questionnaire (20-item Likert scale) ANOVA, frequencies, correlation, chi-square and t-tests
Birch and Thompson, 1997 [28] Non-probability Questionnaire (in-hospital survey) Frequencies
Sinclair, 2001 [32] Non-probability Questionnaire (postal survey, 25-item Likert scale) Descriptive, Factor analyses
Walker et al, 2001 [25] Non-probability Questionnaire (18-item Likert scale) ANOVA, mean, standard deviation
Munro et al, 2002 [24] Non-probability Semi-structured interviews Framework analysis
Altaf et al, 2006 [31] Non-probability Semi-structured interviews Constant Comparative Method
Hindley et al, 2006* [20] Non-probability Semi-structured interviews General thematic analysis
Blix and Ohlund, 2007 [26] Non-probability Interviews Constant Comparative Method
McKevitt et al, 2011 [30] Non-probability Questionnaire (postal survey, 25-item Likert Scale) and Interviews Frequencies and thematic analysis
Hill 2011 [27] Non-probability Semi-structured interviews Colaizzi’s Methods with themes formulated

Smith et al.

Smith et al. BMC Pregnancy and Childbirth 2012 12:166   doi:10.1186/1471-2393-12-166

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