3.1. Baseline Factors and Univariate Analysis. Patients who
have died or were lost to follow-up before 3 months were
excluded from analysis unless they were already documented
to have moderate or severe degrees of fracture collapse. Out
of the 433 total patients treated with a DHS, 354 patients had
a radiological follow-up of at least 3 months and 7 additional
patients had an earlier known moderate or severe collapse. In
all, 361 patients fulfilled the analysis criteria.
Of the 361 patients, 319 (88.4%) had an X-ray taken after
at least 6 months and 293 (81.2%) after at least 9 months.
The mean radiological follow-up was 14.6 months. Definite
survival or mortality data was recovered for 360 (99.7%)
patients at the time of data analysis which was 2.4 to 7.6 years
after surgery (see Table 1).
Out of the 361 patients entered for analysis, 234 had
minimal collapse, 84 had moderate collapse, and 43 had
severe collapse. Out of the 43 patients with severe collapse, 20
patients had complete collapse where the lag screw or blade
was touching the barrel and with no possibility for further