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Table 2 Sample basic characteristics according to the categorized frequency of leisure-time exercise

From: Smoking, leisure-time exercise and frequency of self-reported common cold among the general population in northeastern China: a cross-sectional study

Variables Sample
(n = 1413)
Frequency of leisure-time exercise
Low (< 4 days/month) (N = 375) Medium (1–2 days/week) (N = 624) High (≥3 days/week) (N = 414)
Gender, n (%)**
 Male 627(44.4) 141(34.1) 285(45.7) 201(53.6)
Age, y** 38.92 ± 9.04 35.25 ± 7.55 38.44 ± 8.73 43.79 ± 8.94
Ethnicity, n (%)*
 Han 1293(91.5) 370(89.4) 571(91.5) 352(93.9)
Education levels, n (%)**
 Senior school or less 83(5.9) 10(2.4) 36(5.8) 37(9.9)
 Junior college 326(23.1) 80(19.3) 147(23.6) 99(26.4)
 Bachelor degree 799(56.5) 268(64.7) 336(53.8) 195(52.0)
 Master degree or greater 205(14.5) 56(13.5) 105(16.8) 44(11.7)
BMI** 23.90 ± 5.36 23.10 ± 3.95 24.30 ± 6.92 24.40 ± 3.18
Drinking categories (days/week), n (%)*
 0 859(60.8) 270(65.2) 365(58.5) 224(59.7)
 1–2 468(33.1) 125(30.2) 223(35.7) 120(32.0)
  ≥ 3 86(6.1) 19(4.6) 36(5.8) 31(8.3)
Sleep duration, n (%)*
  < 7 hours 402(28.5) 115(27.8) 168(26.9) 119(31.7)
 7–8 hours 561(39.7) 153(37.0) 256(41.0) 152(40.5)
  ≥ 8 hours 450(31.8) 146(35.3) 200(32.1) 104(27.7)
SRSS, n (%)*
  ≥ 23 594(42) 189(45.7) 260(41.7) 145(38.7)
Self-rated health, n (%)
 Poor 168(11.9) 82(19.8) 59(9.5) 27(7.2)
 Fair 718(50.8) 216(52.2) 353(56.6) 149(39.7)
 Good 527(37.3) 116(28.0) 212(34.0) 199(53.1)
Self-perceived life stress, n (%)*
 Low 217(15.4) 52(12.6) 82(13.1) 83(22.1)
 Fair 751(53.1) 217(52.4) 356(57.1) 178(47.5)
 High 445(31.5) 145(35.0) 186(29.8) 114(30.4)
Self-perceived work stress, n (%)**
 Low 165(11.7) 30(7.2) 56(9.0) 79(21.1)
 Fair 615(43.5) 171(41.3) 292(46.8) 152(40.5)
 High 633(44.8) 213(51.4) 276(44.2) 144(38.4)
SAS, n (%)**
  ≥ 50 219(15.5) 92(22.2) 87(13.9) 40(10.7)
SDS, n (%)*
  ≥ 50 561(39.7) 188(45.4) 238(38.1) 135(36.0)
NE* 3.78(3.10, 4.56) 3.83(3.21, 4.72) 3.82(3.10, 4.57) 3.64(2.97, 4.36)
MO 0.29(0.21, 0.39) 0.29(0.21, 0.38) 0.30(0.21, 0.40) 0.29(0.21, 0.40)
LY 2.15(1.83, 2.54) 2.16(1.81, 2.52) 2.15(1.84, 2.56) 2.12(1.81, 2.51)
  1. Values are shown as the mean ± SD or median (interquartile range) for continuous data and number and proportions for categorical data
  2. P-values were calculated by analysis of variance or Kruskal-Wallis H tests for continuous variables and trend χ2-tests for categorical variables
  3. *Statistical significance: P < 0.05
  4. **Statistical significance: P < 0.001