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Table 2 Odds of obstructive sleep apnea, poor sleep quality, and excessive daytime sleepiness in relation to pre-pregnancy body mass index (BMI)

From: High risk for obstructive sleep apnea and other sleep disorders among overweight and obese pregnant women

  Pre-pregnancy BMI in kg/m2 Unadjusted OR (95 % CI) *Adjusted OR (95 % CI)
  BMI <25 (N = 573) BMI 25–29.9 (N = 350) BMI ≥ 30 (N = 109) BMI 25–29.9 BMI ≥30 BMI 25–25.9 BMI ≥30
Berlin Questionnaire n (%) n (%) n (%)     
 Low risk OSA 561 (97.9) 322 (92.0) 81 (74.3) Reference Reference Reference Reference
 High risk OSA 12 (2.1) 28 (8.0) 28 (25.7) 4.06 (2.04–8.10) 16.2 (7.90–33.04) 3.69 (1.82–7.50) 13.23 (6.25–28.01)
Poor Sleep Quality
 No (PSQI ≤5) 464 (81.0) 275 (78.6) 78 (71.6) Reference Reference Reference Reference
 Yes (PSQI >5) 109 (19.0) 75 (21.4) 31 (28.4) 1.20 (0.83–1.61) 1.70 (1.06–2.70) 1.16 (0.82–1.63) 1.61 (1.00–2.63)
Excessive Daytime Sleepiness
 No (ESS <10) 500 (87.3) 304 (86.9) 95 (87.1) Reference Reference Reference Reference
 Yes (ESS ≥10) 73 (12.7) 46 (13.1) 14 (12.9) 1.03 (0.70–1.54) 1.00 (0.55–1.86) 1.06 (0.70–1.60) 1.07 (0.57–2.03)
  1. *Adjusted for maternal age, education, marital status and parity; Reference group: BMI < 25
  2. OR Odds ratio; CI Confidence Interval; OSA obstructive sleep apnea; PSQI Pittsburgh sleep quality index; ESS Epworth sleepiness scale