Table 1 Shortened versions of the IIFAS-scale
Research | Study design | Cronbach’s alpha of the 17-item scale | Mean | Number of items | Left out items’ numbers | Cronbach’s alpha of the shortened scale |
|---|---|---|---|---|---|---|
Tomás-Almarcha 2016, Spain IIFAS-S9 [33] | Convenience sample 1354 pregnant women, prospective | 0.72 | 66.12 | 9 items | 1, 4, 5, 8, 10, 11, 16, 17 | 0.79 |
AlKusayer 2018, Canada IIFAS-C13 [34] | Cross-sectional, 1238 pregnant women | 0.87 | 13 items | 4, 11, 16, 17 | 0.86 | |
Nanishi 2014, Japan IIFAS-J16 [20] | Longitudinal, 781 pregnant women | 0.46 (citing Inoue [19]) | 61.04 | 16 items | 17 | 0.66 |
Ghasemi 2018, Iran IIFAS-I11 [35] | Cross-sectional, 280 breastfeeding mothers | not reported | neutral (49–69) | 11 items | 1, 4, 5, 8, 10, 17 | 0.85 |
Ying Lau Singapore 2016 [23] | Cross-sectional, 417 multi-ethnic, English speaking pregnant women | not reported | different between ethnic groups, 62–57 | 5, 17 | 0.79 | |
Further research results indicating low CITC for certain items: | ||||||
Abdulahi 2020, Ethiopia [22] | Cross-sectional, 468 pregnant women | 0.72 | 65.7 | 4, 11 | ||
Charafeddine 2016 IIFAS-A Lebanon [18] | Cross-sectional, convenience sample, 196 Arab women, pregnant or peer counselors | 0.64 | 37–85, 72.4% neutral (60–75) attitude | 8, 17 | 0.693 | |
Dai 2013, China [21] | Convenience sample of 660 postpartum women, prospective | 0.623 | 59.82 | 6, 10, 17 | 0.76 | |