Min (0.009215216) was selected as the best lambda value, and eight variables with nonzero coefficients were screened out to be the critical variables associated with the subsequent contralateral hip fracture, including age, Hb, heart disease, neurovascular disease, PD, AD, COPD, and CKD, as shown in Figure 1. Here, GSTM1 is linked to chronic obstructive pulmonary disease.