Table 1.
Demography of the included patients and fractures in both the day 0 (pre-injury) and the 1-year follow-up before and after case control matching. One-way Anova was used for statistical analysis of mean age and Pearson’s Chi-square test for distribution
| Initial responders | Responders after phone reminder | Eventual non-responders | p-value | ||
| Demography crude data | |||||
| Day 0 survey | Number | 317 | 94 | 202 | |
| Mean age (sd) | 62.2 (19.0) | 56.4 (20.3) | 58.5 (23.5) | 0.026 | |
| Female | 214 (68%) | 62 (66%) | 126 (62%) | 0.235 (a) | |
| Fracture before (b) | 8 (2.5%) | 3 (3.2%) | 6 (3.0%) | 0.922 | |
| Case mix (c) | 48/19/7/6/4/16 | 52/16/13/4/4/11 | 44/22/10/9/4/11 | 0.330 | |
| 1-Year survey | Number | 268 | 42 | 86 | |
| Mean age (sd) | 61.6 (18.0) | 58.8 (19.5) | 56.0 (22.4) | 0.056 | |
| Female | 189 (71%) | 27 (64%) | 51 (59%) | 0.048 (a) | |
| Open fracture | 8 (3.0%) | 0 (0.0%) | 0 (0.0%) | - (d) | |
| Fracture after (e) | 15 (5.6%) | 0 (0.0%) | 1 (1.2%) | 0.071 | |
| Case mix (c) | 47/19/9/6/4/16 | 57/17/10/7/2/7 | 56/12/8/5/5/15 | 0.785 | |
| Initial responders | Responders after phone reminder | p-value | |||
| Demography data after case control matching | |||||
| Day 0 survey | Number | 89 | 89 | ||
| Mean age (sd) | 57.1 (20.0) | 56.7 (19.7) | 0.889 | ||
| Female | 48 (54%) | 59 (66%) | 0.242 | ||
| Fracture before (b) | 0 (0.0%) | (0.0%) | - (d) | ||
| Case mix (c) | 55/15/12/3/2/11 | 55/15/12/3/2/11 | 1.000 | ||
| 1-Year survey | Number | 36 | 36 | ||
| Mean age (sd) | 56.6 (19.7) | 56.8 (19.8) | 0.957 | ||
| Female | 23 (64%) | 27 (64%) | 0.971 | ||
| Open fracture | 2 (5.6%) | 0 (0.0%) | - (d) | ||
| Fracture after (e) | 8 (22.2%) | 0 (0.0%) | 0.001 | ||
| Case mix (c) | 64/19/6/3/3/2 | 64/19/6/3/3/2 | 1.000 | ||
aLinear-by-linear association used because of the falling tendency
bCases with another fracture registered in the SFR within one year before the fracture
cDistribution in percentage of the most frequent diagnosis (ICD-10) in the study (S52.5/S42.2/S52.1/multiple fracture/S42.3/every other)
dStatistical analysis cannot be done due to small number
eCases with another fracture registered in the SFR within one year after the fracture