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Table 1 Characteristics of study participants by sex (n = 45,192)

From: Sex differences in the association of metabolic syndrome with low back pain among middle-aged Japanese adults: a large-scale cross-sectional study

  Men (n = 30,695) Women (n = 14,497)
Age (years), n (%)
 40–49 15,038 (49.0) 6964 (48.0)
 50–59 11,152 (36.3) 5565 (38.4)
 60–64 4505 (14.7) 1968 (13.6)
Height (cm) 170.0 (165.8, 174.0) 157.3 (153.6, 161.3)
Weight (kg) 68.1 (61.5, 75.4) 53.7 (48.5, 60.5)
Waist circumference (cm) 84.0 (78.5, 90.0) 78.0 (72.0, 84.5)
Smoking habits, n (%)
 None 11,746 (38.3) 10,995 (75.9)
 Former 6653 (21.7) 1097 (7.6)
 Current 12,280 (40.0) 2401 (16.6)
Alcohol intake, n (%)
 None 7999 (26.1) 7610 (52.5)
 Sometimes 10,190 (33.2) 4543 (31.4)
 Everyday 12,489 (40.7) 2336 (16.1)
Physical activity (min/day), n (%)
 ≥ 60 10,456 (34.1) 4372 (30.2)
 < 60 20,183 (65.9) 10,091 (69.8)
Metabolic syndrome, n (%)
 + 5402 (17.6) 506 (3.5)
 − 25,293 (82.4) 13,991 (96.5)
Low back pain, n (%)
 + 641 (2.1) 246 (1.7)
 − 30,054 (97.9) 14,251 (98.3)
Systolic blood pressure (mmHg) 128 (117, 141) 119 (108, 134)
Diastolic blood pressure (mmHg) 80 (71, 88) 73 (65, 82)
High-density lipoprotein (mg/dl) 55 (47, 66) 68 (58, 78)
Triglycerides (mg/dl) 104 (72, 155) 71 (53, 101)
Blood glucose (mg/dl) 93 (87, 101) 88 (83, 94)
  1. Values are presented as median (25th and 75th percentile), except where indicated as n (%)