You are viewing the site in preview mode

Skip to main content

Advertisement

Table 2 Odds Ratio (OR) and 95% confidence interval (CI) of spontaneous preterm birth according to maternal sleep duration and vital exhaustion during the first six months of pregnancy, Lima, Peru, 2009-2010

From: Sleep duration, vital exhaustion, and odds of spontaneous preterm birth: a case–control study

  Term Controls (N = 480) Cases (N = 479) Unadjusted Adjusted* Adjusted**
Exposure parameters n % n % OR (95% CI) OR (95% CI) OR (95% CI)
Hours of sleep per night           
 ≤ 6 hours 79 16.5 107 22.3 1.55 (1.11-2.16) 1.56 (1.11-2.19) 1.53 (1.08-2.17)
 7-8 hours 325 67.7 284 59.3 1.00 referent 1.00 referent 1.00 referent
 ≥ 9 hours 76 15.8 88 18.4 1.33 (0.94-1.87) 1.34 (0.94-1.91) 1.50 (1.04-2.16)
Complaint of vital exhaustion           
 Never 185 38.5 99 20.7 1.00 referent 1.00 referent 1.00 referent
 Ever 295 61.5 380 79.3 2.41 (1.81-3.21) 2.41 (1.79-3.23) 2.46 (1.83-3.32)
   1-3 times/Month 204 42.5 201 41.9 1.84 (1.35-2.52) 1.89 (1.38-2.60) 1.97 (1.43-2.72)
   4 times/Month - Weekly 73 15.2 156 32.6 3.99 (2.76-5.78) 3.85 (2.64-5.62) 3.91 (2.67-5.73)
   Daily 18 3.8 23 4.8 2.39 (1.23-4.64) 2.42 (1.23-4.76) 2.23 (1.12-4.45)
P-value for trend       <0.001   <0.001   <0.001
  1. *Adjusted for maternal age, pre-pregnancy weight, unplanned pregnancy, and no vitamin use during pregnancy.
  2. **Same as above but now also include sleep duration and vital exhaustion in the model.
  3. Bolded estimates are statistically significant at the α = 0.05 level.