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. Author manuscript; available in PMC: 2015 Jun 9.
Published in final edited form as: Obes Surg. 2011 Sep;21(9):1413–1423. doi: 10.1007/s11695-011-0359-4

Table 2. Sex differences in clinical characteristics.

Women (n=14) Men (n=9) P value
Anthropometrics
 Baseline BMI, kg/m2 51.9±6.01 53.1±9.50 0.710
 ΔBMI, kg/m2 −16.9±4.87 −16.3±7.69 0.815
 Baseline neck, cm 42.7±3.20 50.6±3.09 <0.001
 Δneck, cm −5.9 [−6.8–(−4.3)] −6.8 [−8.7–(−5.8)] 0.095
 Baseline waist circumference, cm 137.2±15.13 156.8±16.42 0.008
 Δwaist circumference, cm −34.7± 13.55 −37.5± 17.18 0.673
 Baseline waist-to-hip ratio 0.93 ±0.077 1.04±0.065 0.002
Δwaist-to-hip ratio −0.07±0.119 −0.03±0.058 0.320
Adipocytokines
 Baseline CRP, mg/L 11.4±5.19 8.7±3.13 0.168
 ΔCRP, mg/L −8.5±4.99 −3.5±3.32 0.038
 Baseline TNF-α, pg/mL 2.17±0.525 2.97±0.847 0.011
 ΔTNF-α, pg/mL −0.10 (−0.28–0.07) −0.03 (−0.40–0.12) 0.753
 Baseline sTNFαR1, pg/mL 3,267.6±1,380.8 3,883.0±1,096.4 0.273
 ΔsTNFαR1, pg/mL −222.3 (−1,087–253.5) −548.9 [−653.3–(−161.9)] 0.795
 Baseline sTNFαR2, pg/mL 5,393.2±1,227.8 5,991.9±1,629.8 0.327
 ΔsTNFαR2, pg/mL −974.7±805.2 −878.3±1,611.9 0.850
 Baseline leptin, ng/mL 85.35±26.51 46.36±14.10 <0.001
 Δleptin, ng/mL −39.2 [−79.4–(−33.6)] −22.4 (−42.3–7.35) 0.078
 Baseline leptin receptor, ng/mL 14.9 (12.55–16.60) 16.25 (15.5–16.95) 0.156
 Δleptin receptor, ng/mL 3.75 (−1.8–7.7) 1.75 (−0.6–5.15) 0.706
 Baseline leptin/leptin receptor ratio 5.79±1.980 2.83±0.991 <0.001
 Δleptin/leptin receptor ratio −3.6 [−6.07–(−1.96)] −1.4[−3.0−(−0.43)] 0.014
Sleep architecture
 Baseline N1, % 9.0±5.93 24.7±15.12 0.002
 ΔN1, % −0.2±5.54 −13.0±15.38 0.009
 Baseline N2, % 62.2 ±9.44 56.4±16.19 0.285
 ΔN2, % 2.9±13.34 8.6±18.74 0.401
 Baseline N3, % 14.4 (8.7–20.3) 0.4 (0–8.6) 0.012
 ΔN3, % −8.5±9.27 −3.4±5.17 0.148
 Baseline REM, % 15.1 ±6.08 14.0±9.73 0.734
 ΔREM, % 5.9±10.07 7.8±11.57 0.676
Polysomnography results
 Baseline total AHI, events/h 16.9 (10–32.8) 88.7 (61.2–94.6) 0.003
 Δtotal AHI, events/h −7.9 [−21.6–(−4.5)] −63.2 [−91.7–(−43.5)] 0.003
 Baseline NREM AHI, events/h 11.8 (5.2–23.4) 95.2 (60.4–101.6) 0.003
 ΔNREM AHI, events/h −5.0 [−14–(−3.2)] −70.9 [−94.8–(−49.22)] 0.006
 Baseline REM AHI, events/h 45.4±25.81 59.2±27.67,646 0.235
 ΔREM AHI, events/h −32.4±27.17 −37.0±32.94 0.720

Continuous variables with normal distribution are presented as means±SD and compared with use of a Student's t test. Continuous variables with non-normal distributions are presented as medians (IQR) and compared with use of the Wilcoxon rank-sum test