66 Gender differences Table 1 shows that there were no significant differences per gender with regard to the total FSS score. Women scored higher (4.56 ± 1.22) than men (4.22 ± 1.57) on the total FSS score and also in all separate statements except statement 1. On statement 8 this difference was significant (w:5.03 ± 2.08, m:4.08 ± 2.42 (p = 0.048). Table 1 Mean score per FSS statement for the whole OI group and according to gender FSS Statements Mean score 95% Confidence interval Mean men Mean women Difference gender signific. * 1 5.43 5.14-5.59 5.47 ± 1.67 5.41 ± 1.38 0.837 2 4.16 3.82-4.5 4.03 ± 1.76 4.25 ± 1.69 0.538 3 4.63 4.27-4.99 4.21 ± 1.99 4.89 ± 1.63 0.069 4 4.66 4.32-4.99 4.58 ± 1.87 4.70 ± 1.56 0.719 5 3.71 3.36-4.06 3.66 ± 2 3.74 ± 1.6 0.836 6 4.23 3.86-4.7 4.16 ± 2.4 4.36 ± 1.92 0.661 7 4.14 3.75-4.53 3.89 ± 2.12 4.3 ± 1.82 0.320 8 4.67 4.22-5.12 4.08 ± 2.42 5.03 ± 2.08 0.048 9 4.19 3.77-4.62 3.87 ± 2.26 4.39 ± 2.04 0.338 Total 4.43 4.16–4.7 4.22 ± 1.57 4.56 ± 1.22 0.234 *independent t test Age group distribution A visual comparison of the separate FSS scores between the different age categories is shown in Figure 1. The FSS score for question 1 in age category 41–45 is significantly lower (2.4) than the remainder age categories in our study cohort (5.8). (independent t test p = 0.000). All other comparison did not reveal significantly different values. Differences between types of OI There were no significant differences per OI type for the mean FSS score. The FSS mean scores were in all OI types ≥4 (Table 2). There were no significant differences per OI type for the separate FSS statements (data not shown). In the group with a mean FSS ≥5, the distributions regarding OI type were: OI type 1: 64.3% (n = 27), OI type 3: 13.4% (n = 6), OI type 4: 21.4% (n = 9). People with OI type 4 scored higher than people with OI type 3 and OI type 1 on question 3, 6 and 8.
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