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Table 1 Characteristics of studied groups: univariate analysis of age, sexual, reproductive and behavioural history.

From: Human Papillomaviruses and genital co-infections in gynaecological outpatients

  HPV(+) HPV(-) Total HPV(+) % Comparison* 95% CI significance
TOTAL: frequency 266 591 857 31.0%    
Age        
mean age (years) (sd) 31.1(8.0) 33.5(7.5) 32.7(7.6)   diff. -2.4 -1.3 to -3.5 t = -4.26,
P < 0.00005
Frequency:        
<25 years 63 72 135 46.7% OR = 1.00   
25- years 58 116 174 33.3% OR = 0.57 0.36 to 0.91 P = 0.017
30- years 68 142 210 32.4% OR = 0.55 0.35 to 0.85 P = 0.008
35- years 36 144 180 20.0% OR = 0.29 0.17 to 0.47 P < 0.00005
40+ years 41 117 158 25.9% OR = 0.40 0.25 to 0.65 P = 0.0003
Age at 1st intercourse        
mean age (years) 18.6 19.6 19.3   diff. -1.01 -0.49 to -1.54 t = -3.79,
P = 0.0002
Frequency:        
<16 years 25 42 67 37.3% OR = 1.00   
16 years 34 55 89 38.2% OR = 1.04 0.54 to 2.00 P = 0.91
17 years 44 73 117 37.6% OR = 1.01 0.54 to 1.88 P = 0.97
18 years 58 115 173 33.5% OR = 0.85 0.47 to 1.52 P = 0.58
19 years 36 55 91 39.6% OR = 1.10 0.57 to 2.11 P = 0.77
20 years 21 87 108 19.4% OR = 0.41 0.20 to 0.81 P = 0.01
21 years 15 24 39 38.5% OR = 1.05 0.47 to 2.37 P = 0.91
22+ years 33 140 173 19.1% OR = 0.40 0.21 to 0.74 P = 0.004
Number of partners        
   mean 4.20 2.83 3.26   diff. 1.37 0.96 to 1.79 t = 6.51,
P < 0.00005
   frequency:        
1 partner 39 234 273 14.3% OR = 1.00   
2 partners 46 129 175 26.3% OR = 2.14 1.33 to 3.45 P < 0.00005
3 partners 58 86 144 40.3% OR = 4.05 2.52 to 6.51 P < 0.00005
4 partners 41 42 83 49.4% OR = 5.86 3.39 to 10.13 P < 0.00005
5–9 partners 54 75 129 41.9% OR = 4.32 2.65 to 7.03 P < 0.00005
10+ partners 28 25 53 52.8% OR = 6.72 3.55 to 12.71 P < 0.00005
Parity        
   Nulliparous 215 432   33.2% OR = 1.00   
   Parous 51 159   24.3% OR = 0.64 0.45 to 0.92 P = 0.0154
Spontaneous abortion        
   No 238 485 723 32.9% OR = 1.00   
   Yes 28 106 134 20.9% OR = 0.54 0.35 to 0.84 P = 0.0063
Induced abortion        
   No 227 493 720 31.5% OR = 1.00   
   Yes 39 98 137 28.5% OR = 0.86 0.58 to1.29 P = 0.48
Contraceptives        
never used any type 210 455 665 31.5% OR = 1.00   
have used at least one type 56 136 192 29.2% OR = 0.89 0.63 to 1.27 P = 0.52
Smoking        
never smoked 168 432 600 28.0% OR = 1.00   
ever smoked 98 159 257 38.1% 1.58 1.17 to 2.16 P = 0.003
  1. *diff. is the difference between two mean values and OR is the odds ratio compared with the first category.