Table 4

Summary of hierarchical regression predicting greater length of stay^*

Variable	B	SE	p value	β	95% CI
Block 1
Age	0.026	0.012	0.024	0.198	0.003 to 0.049
Sex	0.442	0.139	0.002	0.178	0.169 to 0.715
BMI	0.026	0.010	0.011	0.159	0.006 to 0.047
CCI	0.088	0.074	0.24	0.104	–0.058 to 0.235
ASA	0.299	0.112	0.008	0.165	0.079 to 0.519
Anesthesia	–0.170	0.168	0.31	–0.059	–0.500 to 0.160
Pain/stiffness	0.398	0.154	0.010	0.149	0.094 to 0.702
Nausea	0.205	0.160	0.201	0.073	–0.110 to 0.521
Numbness	0.386	0.155	0.014	0.141	0.080 to 0.692
Lightheadedness	0.045	0.166	0.79	0.015	–0.282 to 0.372
Drowsiness	0.299	0.249	0.23	0.069	–0.192 to 0.790
R²	0.228
F	7.281
p value	< 0.001
Block 2
Age	0.022	0.012	0.06	0.163	–0.001 to 0.044
Sex	0.392	0.138	0.005	0.158	0.120 to 0.664
BMI	0.023	0.010	0.029	0.137	0.002 to 0.043
CCI score	0.096	0.073	0.19	0.113	–0.049 to 0.240
ASA score	0.310	0.110	0.005	0.172	0.093 to 0.527
Anesthesia	–0.107	0.167	0.52	–0.037	–0.436 to 0.223
Pain/stiffness	0.373	0.153	0.015	0.140	–0.072 to 0.674
Nausea	0.106	0.162	0.52	0.038	–0.214 to 0.425
Numbness	0.298	0.157	0.06	0.109	–0.011 to 0.607
Lightheadedness	–0.016	0.166	0.92	–0.005	–0.343 to 0.310
Drowsiness	0.132	0.254	0.60	0.031	–0.368 to 0.632
Degree of mobilization	–0.196	0.071	0.006	–0.166	–0.335 to –0.056
R²	0.249
R²	0.021
ΔF	7.575
p value	0.006

ASA = American Society of Anesthesiologists physical status classification; BMI = body mass index; CCI = Charlson Comorbidity Index; CI = confidence interval; SE = standard error.
↵* The analysis was based on data for the 283 patients in the final sample. Sex was coded as 0 = male, 1 = female. Anesthesia was coded as 0 = general, 1 = spinal. Patient-reported symptoms were coded as 0 = no, 1 = yes.