Table 1.
Comparison between variables in preterm and full term labor using univariate analysis
| Variable | χ2 | df | P-value | Sig |
|---|---|---|---|---|
| Mothers’ age | 1.29 | 1 | 0.21 | NS |
| Education | 3.82 | 2 | 0.14 | NS |
| Job | 6.24 | 1 | 0.1 | NS |
| Height | 1.29 | 1 | 0.21 | NS |
| Weight | 2.19 | 1 | 0.17 | NS |
| Place of residence | 65.3 | 2 | 0.16 | NS |
| Income | 6.79 | 1 | 0.09 | NS |
| Nutrition status | 2.19 | 1 | 0.17 | NS |
| BMI | 5.41 | 2 | 0.06 | NS |
| Number of deliveries | 5.98 | 2 | 0.06 | NS |
| Number of pregnancies | 9.91 | 1 | 0.001 | S |
| History of abortion | 2.19 | 1 | 0.17 | NS |
| Stillbirth history | 2.29 | 1 | 0.13 | NS |
| Twin or multiplex pregnancy | 2.43 | 1 | 0.11 | NS |
| Smoking | 1.09 | 1 | 0.32 | NS |
| Alcohol usage | 0.79 | 1 | 0.49 | NS |
| Pregnancy excess weight | 6.79 | 1 | 0.09 | NS |
| General health status | 18.6 | 2 | 0.002 | S |
| History of preterm labor | 2.29 | 1 | 0.13 | NS |
| Exposure to radiation | 2.19 | 1 | 0.17 | NS |
| History of diabetes mellitus/ thyroid dysfunction/cardiac disease of mothers | 9.64 | 3 | 0.004 | S |
Abbreviations: df, degrees of freedom; Sig, significance; NS, not significant; S, significant; BMI, body mass index.