Table 3. Length of hospital stay in relation to categorical variables.
| Variable | n | Length of hospital stay (days) | p-value | ||
|---|---|---|---|---|---|
| Average | Median | IIQ | |||
| Age group | |||||
| ≤ 60 years old | 56 | 4.8 | 4 | 4-6 | 0.42 |
| 61 to 65 years old | 76 | 4.9 | 5 | 4-6 | |
| 66 to 70 years old | 74 | 5.2 | 4 | 3-5.3 | |
| > 70 | 64 | 4.9 | 5 | 4-6 | |
| Sex | |||||
| Male | 88 | 5.5 | 5 | 4-6 | 0.015 |
| Women | 182 | 4.7 | 4 | 3.8-6 | |
| Side | |||||
| Right | 144 | 4.7 | 4 | 3-6 | 0.058 |
| Left | 126 | 5.3 | 5 | 4-6 | |
| ASA | |||||
| ASA 1 | 27 | 4.6 | 4 | 3-6 | 0.36 |
| ASA 2 | 240 | 5.0 | 5 | 4-6 | |
| Diabetes | |||||
| Yes | 61 | 5.3 | 5 | 3.5-6 | 0.65 |
| No | 209 | 4.9 | 5 | 4-6 | |
| High blood pressure | |||||
| Yes | 206 | 4.9 | 5 | 4-6 | 0.85 |
| No | 64 | 5.1 | 4.5 | 4-6 | |
| Hypothyroidism | |||||
| Yes | 18 | 4.9 | 4.5 | 4-6 | 0.85 |
| No | 252 | 5.0 | 5 | 4-6 | |
| Obesity | |||||
| Yes | 130 | 4.7 | 5 | 4-6 | 0.092 |
| No | 87 | 5.4 | 5 | 4-6 | |
| Type of prosthesis | |||||
| Fixed | 176 | 5.2 | 5 | 4-6 | 0.002 |
| Rotatory | 94 | 4.5 | 4 | 3-5 | |
IIQ, interquartile range (Q1-Q3). Kruskal-Wallis ANOVA for comparison between four categories and Mann-Whitney test for two categories.