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Table 2 Characteristics of the women participating in EPINCONT1 (E1, 1995 – 1997), EPINCONT2 (E2, 2006 – 2008) and both EPINCONT surveys

From: Prevalence, incidence and remission of urinary incontinence in women: longitudinal data from the Norwegian HUNT study (EPINCONT)

  E1 E2 Pb E1 and E2c Pd
Participantsa N = 27 992 N = 21 804   N = 14 606  
  N % N %   N %  
Age distribution (years)      <0.001    <0.001
 20 – 34 6 630 23.7 3 113 14.3   494 3.4  
 35 – 49 8 671 31.0 6 132 28.1   3 967 27.2  
 50 – 64 6 589 23.5 7 352 33.7   5 910 40.5  
 65 + 6 101 21.8 5 207 23.9   4 235 29.0  
BMI      <0.001    <0.001
 Underweight (≤ 18.4) 267 1.0 182 0.8   89 0.6  
 Normal (18.5 – 24.9) 12 169 43.8 8 212 37.8   5 095 35.0  
 Overweight (25.0 – 29.9) 10 301 37.1 8 260 38.0   5 839 40.1  
 Obese (≥ 30) 5 028 18.1 5 072 23.3   3 538 24.3  
Self-perceived health status      0.038    <0.001
 Bad 449 1.6 274 1.3   176 1.2  
 Not entirely good 7 312 26.3 5 569 26.4   4 007 28.4  
 Good 15 488 55.8 11 834 56.1   7 935 56.2  
 Excellent 4 505 16.2 3 424 16.2   2 006 14.2  
Smoking      0.095    0.009
 Not smoking 19 651 71.2 15 273 71.4   10 395 73.1  
 Smoking 7 952 28.8 5 975 28.1   3 818 26.9  
Glasses alcohol last 2 weeks      <0.001    0.016
 0 7 002 34.0 5 947 32.3   3 805 30.9  
 1 – 4 11 425 55.5 9 421 51.2   6 356 51.6  
 >5 2 160 10.5 3 047 16.5   2 147 17.4  
Parity      <0.001    <0.001
 0 3 931 14.2 2 633 12.1   895 6.1  
 1 3 229 11.7 2 090 9.6   1 150 7.9  
 2 8 951 32.3 7 633 35.1   5 446 37.3  
 3+ 11 595 41.9 9 415 43.2   7 101 48.7  
Hysterectomy 1 773 13.4 2 040 10.6 <0.001 1 574 11.2 0.111
Asthma 2 390 8.6 2 318 10.6 <0.001 1 534 10.5 0.694
Chronic cough 829 3.0 881 4.1 <0.001 605 4.2 0.615
Diabetes 739 2.6 816 3.7 <0.001 613 4.2 0.029
Angina 979 3.5 534 2.4 <0.001 415 2.8 0.021
Heart attack 415 1.5 327 1.5 0.893 258 1.8 0.047
Stroke 459 1.6 474 2.2 <0.001 368 2.5 0.032
  1. a: Women with a valid answer to the entry question in EPINCONT.
  2. b: p - values from chi - square tests comparing the women who participated in E1 with those who participated in E2.
  3. c: Variables from HUNT3 were used.
  4. d: p - values from chi - square tests comparing women who participated in E2 with those who participated in both E1 and E2.