Table 2
Summarised results of crude prevalence and multiple logistic regression† for estimating the prevalence odds ratios of spondylolisthesis associated with personal and occupational factors
| Factors | N (prevalence)‡ | Prevalence ORs and 95% CIs | |
|---|---|---|---|
| Crude OR (95% CI) | Adjusted OR (95% CI)¶ | ||
| *p<0.05; **p<0.01. | |||
| †The Hosmer-Lemeshow test for the goodness-of-fit of the final adjusted model: p = 0.73 | |||
| ‡Number of subjects and crude prevalence of spondylolisthesis in each category. The total number of subjects slightly differed across categories because of missing data. A total of 1166 subjects were included in the final logistic model. | |||
| ¶Adjusted for frequency of lifting tasks, bending and twisting, smoking habit, alcohol dinking, and all the other factors indicated in the table. | |||
| Professional seniority (years) | |||
| ⩽5 | 359 (1.1%) | 1 | 1 |
| 6–15 | 543 (2.4%) | 2.2 (0.7 to 6.7) | 1.9 (0.6 to 6.1) |
| >15 | 324 (7.1%) | 6.8 (2.3 to 19.8)** | 3.4 (1.1 to 10.7)* |
| Trend test | p<0.001 | p = 0.02 | |
| Age (years) | |||
| ⩽45 | 688 (1.3%) | 1 | 1 |
| 46–55 | 383 (4.7%) | 3.7 (1.7 to 8.4)** | 2.6 (1.1 to 6.6)* |
| >55 | 163 (8%) | 6.5 (2.7 to 15.6)** | 4.8 (1.8 to 12.9)** |
| Trend test | P<0.001 | p = 0.002 | |
| Gender | |||
| Male | 1185 (3.1%) | 1 | 1 |
| Female | 49 (6.1%) | 2.0 (0.6 to 6.8) | 1.9 (0.5 to 7.2) |
| Body mass index (kg/m2) | |||
| <25 | 644 (2.1%) | 1 | 1 |
| ⩾25 | 550 (4.5%) | 2.2 (1.1 to 4.2)* | 2.2 (1.1 to 4.6)* |
| Frequent strenuous exercise | |||
| No | 939 (2.6%) | 1 | 1 |
| Yes | 293 (5.5%) | 2.2 (1.2 to 4.2)* | 2.2 (1.1 to 4.5)* |
