144 Chapter 6 Table 3. BBS-scores by discipline (n=199) Total group (n=199) Community midwives (n=97) Hospital-based midwives (n=48) Obstetricians (n=54) M SD min-max M SD min-max M SD min-max M SD min-max BBSMed 2.72 0.63 1.17-4.17 2.35 0.48 1.17-3.50 2.92 0.53 1.50-3.83 3.22 0.52 2.00-4.17 BBSNat 3.89 0.60 2.00-5.00 4.24 0.39 3.40-5.00 3.94 0.46 2.60-4.80 3.21 0.42 2.00-4.20 The difference between the disciplines was statistical significant using one-way ANOVA for the BBS-Med subscale (F 55.367, p<0.001), and for the BBS-Nat subscale (F 107.676, P<0.001). The Bonferroni post hoc test showed that there was a significant difference between all groups on both the BBS-Med and BBS-Nat. Examine the potential relationship between different regions in the Netherlands and birth beliefs Using regression analysis, the impact of the type of MCN (high or low IOL rate) on the association between disciplines and BBS scores was examined. Subsequently, association with work experience and place of training was examined. The variable years of work experience was visually inspected for linearity with the BBS-Med and BBS-Nat subscales and was included as a continuous variable (21). For the BBS-Med subscale, MCN, work experience, and place of training were not significant in the regression models. For the BBS-Nat subscale, the factors MCN and work experience were significant in the regression analysis, with interaction on the association between BBS-Nat and discipline. Place of training was not significant in the regression analysis for BBS-Nat. We made final regression models stratified by type of MCN to estimate the association between discipline and BBS-Nat score, controlling for work experience. The highest BBS-Nat score was estimated for community midwives in MCNs with a high IOL rate, and the lowest for obstetricians in MCNs with a high IOL rate. It was notable that years of work experience had a small decreasing effect on the BBS-Nat score for community midwives and on the contrary a small increasing effect for hospital-based midwives and obstetricians (Box 2 and Supplementary tables).
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