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Table 1 Characteristics of study participants by sex and age groups, NIPPON DATA2010, 2010, Japan ( n=2749 )

From: Association between socioeconomic status and prolonged television viewing time in a general Japanese population: NIPPON DATA2010

  Men ( n=1,172 ) Women ( n=1,577 )
<60 years ≥60years P value <60 years ≥60years P value
Number 463 (40) 709 (60.5)   740 (46.9) 837 (53.1)  
Age, years (SD) 44.1 (10.6) 70.2 (7.0) <0.001 43.8 (10.4) 70.5 (7.0) <0.001
Body mass index, kg/m2 (SD) 24.1 (3.6) 23.8 (2.9) 0.074 22.0 (3.6) 23.3 (3.4) <0.001
Television viewing time, hour (SD) 2.4 (1.7) 3.8 (2.6) <0.001 2.1 (1.8) 3.2 (2.2) <0.001
Employment status, n (%)
 Working 431 (93.1) 313 (44.1) <0.001 474 (64.1) 185 (22.1) <0.001
 Not working 32 (6.9) 396 (55.9)   266 (35.9) 652 (77.9)  
Educational attainment, n (%)
 High (13 ≤) 221 (47.7) 162 (22.8) <0.001 378 (51.1) 100 (11.9) <0.001
 Middle (10–12) 209 (45.1) 287 (40.5)   310 (41.9) 410 (49.0)  
 Low (<10) 33 (7.1) 260 (36.7)   52 (7.0) 327 (39.1)  
Living status, n (%)
 Living with spouse 333 (71.9) 601 (84.8) <0.001 563 (76.1) 535 (63.9) <0.001
 Living with others 79 (17.1) 34 (4.8)   145 (19.6) 130 (15.5)  
 Living alone 51 (11.0) 74 (10.4)   32 (4.3) 172 (20.5)  
Equivalent household expenditure, 104JPY/month, n (%)
 1st tertile (< 10.6) 170 (36.7) 208 (29.3) 0.030 210 (28.4) 279 (33.3) 0.105
 2nd tertile (10.6 - 16.2) 156 (33.7) 262 (37.0)   272 (36.8) 286 (34.2)  
 3rd tertile (16.3) 137 (29.6) 239 (33.7)   258 (34.9) 272 (32.5)  
Smoking habit, n (%)
 Currently 177 (38.2) 141 (19.9) <0.001 84 (11.3) 16 (1.9) <0.001
 Past 128 (27.6) 318 (44.9)   62 (8.4) 33 (3.9)  
 Never 158 (34.1) 250 (35.3)   594 (80.3) 788 (94.2)  
Drinking alcohol habit, n (%)
 Currently 343 (74.1) 504 (71.1) 0.010 350 (47.3) 218 (26.0) <0.001
 Past 6 (1.3) 32 (4.5)   12 (1.6) 8 (1.0)  
 Never 114 (24.6) 173 (24.4)   378 (51.1) 611 (73.0)  
Exercise habits, n (%)
 Have exercise habits 119 (25.7) 324 (45.7) <0.001 168 (22.7) 328 (39.2) <0.001
 Not have exercise habits 344 (74.3) 385 (54.3)   572 (77.3) 509 (60.9)  
House ownership, n (%)
 Own house 347 (74.9) 606 (85.5) <0.001 556 (75.1) 727 (86.9) <0.001
 Rented house 116 (25.1) 103 (14.5)   184 (24.9) 110 (13.1)  
Past of history (stroke, myocardial infarction) , n (%)
 Have past history 17 (3.7) 105 (14.8) <0.001 3 (0.4) 72 (8.6) <0.001
 Not have past history 446 (96.3) 604 (85.2)   737 (99.6) 765 (91.4)  
  1. SD, standard deviation; JPY, Japanese Yen
  2. Data are presented as mean (SD) or as a number (%)
  3. P value for differences between <60 years and ≥60 years were estimated by t-test for continuous variables, Mann-Whitney tests for television viewing time, and chi-squared tests for categorical variables