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Table 4 The compare of cumulative mortality after injury between two groups

From: Long-term survival of femoral neck fracture patients aged over ninety years: Arthroplasty compared with nonoperative treatment

Cumulative mortality after injuryTreatment regimeχ2P
Nonoperative group N (%)Arthroplasty group N(%)
0-30 days9 (17.0)3 (9.1)1.0550.304
0–1 year23 (43.4)4 (12.1)9.2360.002*
0–2 year27 (50.9)8 (24.2)6.0080.014*
0–3 year34 (64.2)13 (39.4)5.0290.025*
0–4 year38 (71.7)15 (45.5)5.9230.015*
0–5 year42 (79.2)17 (51.5)7.2610.007*
Total42 (79.2)17 (51.5)7.2610.007*
  1. * P < 0.05 was considered statistically significant