Table 3.
Multivariate logistic regression analysis of independent predictors of VVs
| β | P | AOR (95%CI) | |
|---|---|---|---|
| Age (years): | |||
| <25 | - | 1 (r) | |
| 25 and more | 2.2 | ≤0.001 | 8.7 (2.6-28.4) |
| Workplace: | |||
| Inpatient wards/outpatients | - | 1 (r) | |
| Emergency rooms | 2.4 | 0.001 | 10.8 (2.6-45.9) |
| ICU/operative rooms | 2.8 | ≤0.001 | 16.2 (3.9-67.4) |
| OCP use*: | |||
| No | - | 1 (r) | |
| Yes | 1.4 | 0.015 | 4.2 (1.3-13.2) |
| Constant | -5.9 | ||
| Model χ | χ2=65.6, P≤0.001 | ||
| Percent correctly predicted | 87.6% | ||
*Females only. AOR: Adjusted Odds Ratio. r: Reference group. OCP: Oral Contraceptive. N.B. The model included (age, marital status, exercise, obesity, workplace, duration of work, daily working hours, static standing, chronic constipation, OCP use, and gravidity) which were the significant predictors in univariate analysis