Table 1 Comparison of variables associated with two–score based groups.

From: Sleep disorder, an independent risk associated with arterial stiffness in menopause

Variables PSQI < 8 PSQI ≥ 8 total p
n = 1017 n = 630 n = 1647
Age (years) 49.3 ± 5.92 51.8 ± 5.70 50.29 ± 5.95 <0.001
BMI (Kg/m2) 23.01 ± 2.94 23.43 ± 3.27 23.18 ± 3.17 0.006
Waist–hip ratio (ratio) 0.82 ± 0.07 0.84 ± 0.07 0.83 ± 0.07 <0.001
SBP (mmHg) 118 ± 15 128 ± 18 121 ± 16 <0.001
DBP (mmHg) 72 ± 9 77 ± 10 74 ± 10 <0.001
Pulse pressure (mmHg) 46 ± 9 50 ± 11 48 ± 10 <0.001
Heart rate (beats/min) 70.10 ± 10.37 72.16 ± 11.30 71.77 ± 37.99 <0.001
Triglycerides (mmol/L) 1.35 ± 1.15 1.53 ± 1.14 1.47 ± 1.23 0.019
Total cholesterol (mmol/L) 5.25 ± 1.05 5.40 ± 1.15 5.27 ± 1.17 <0.001
HDL (mmol/L) 1.53 ± 0.40 1.49 ± 0.36 1.52 ± 0.40 0.015
LDL (mmol/L) 2.98 ± 0.78 3.18 ± 0.86 3.05 ± 0.82 <0.001
FBG (mmol/l) 5.31 ± 1.14 5.60 ± 1.30 5.41 ± 1.20 <0.001
BaPWV (cm/s) 1274.9 ± 194.4 1447.2 ± 246.0 1341.5 ± 231.7 <0.001
Menopausal status     <0.001
 Premenopause, n (%) 416 (80.8%) 99 (19.2%) 515 (31.3%) <0.001
 Perimenopause, n (%) 215 (56.9%) 163 (43.1%) 378 (22.9%) 0.031
 Early postmenopause, n (%) 202 (53.3%) 177 (46.7%) 379 (23.0%) <0.001
 Late postmenopause, n (%) 184 (49.1%) 191 (50.9%) 375 (22.8%) <0.001
Marital status     0.627
 Married, n (%) 1008 (80.0%) 626 (20.0%) 1634 (92.1%) 0.704
 Single/Separated, n (%) 9 (61.7%) 4 (38.3%) 13 (7.9%) 0.787
 Divorced/Widowed     
Education, n (%)     0.100
 Illiteracy 93 (57.8%) 68 (42.2%) 161 (9.8%) 0.273
 Primary 79 (54.9%) 65 (45.1%) 144 (8.7%) 0.057
 Junior high 280 (61.1%) 178 (38.9%) 458 (27.8%) 0.570
 Senior high 269 (60.7%) 174 (39.3%) 443 (26.9%) 0.450
 College 275 (68.6%) 126 (31.4%) 401 (24.3%) 0.002
 Postgraduate or above 21 (52.5%) 19 (47.5%) 40 (2.4%) 0.201
Employment status, n(%)     <0.001
 Work 676 (66.7%) 338 (33.3%) 1014 (61.6%) <0.001
 Departure 139 (61.8%) 86 (38.2%) 225 (13.7%) 1.000
 Retirement 202 (49.5%) 206 (50.5%) 408 (24.8%) <0.001
Income (RMB/month), n (%)     <0.001
 <1000 223 (57.3%) 166 (42.7%) 389 (23.6%) 0.046
 1000–3000 190 (54.8%) 157 (45.2%) 347 (21.1%) 0.003
 3000–5000 258 (64.7%) 141 (35.3%) 399 (24.2%) 0.169
 5000–10000 177 (63.9%) 100 (36.1%) 277 (16.8%) 0.419
 >10000 169 (71.9%) 66 (28.1%) 235 (14.3%) 0.001
Parity, n (%)     <0.001
 0 29 (80.6%) 7 (19.4%) 36 (2.2%) 0.109
 1–2 923 (63.0%) 542 (37.0%) 1465 (88.9%) 0.004
 ≥3 65 (44.5%) 81 (55.5%) 146 (8.9%) <0.001
History of disease     
 Hypertension, n (%) 165 (43.2%) 217 (56.8%) 382 (23.2%) <0.001
 Diabetes mellitus, n (%) 93 (42.5%) 126 (57.5%) 219 (13.3%) <0.001
  1. Data were expressed as mean ± SD or frequencies. All data were normally distributed. Age, height, BMI, WHR, SBP, DBP, PP, HR, TC didn’t satisfy the homogeneity of variance, and were analyzed by Mann–Whitney U test. Other continuous variables were determined by independent–Samples T tests. Ordered categorical variables were computed by Wilcoxon rank sum test, while unordered two–categorical variables were tested by χ2 tests.