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Table 1 Characteristics of women diagnosed with cervical cancer in Norway by age, 1953–2013

From: Cervical cancer in women under 30 years of age in Norway: a population-based cohort study

  All ages Age < 25 Age 25–29 Age ≥ 30 p-differencea
n % n % n % n %
Period of diagnosis          
1953–68 5,495 26.0 13 6.3 106 11.6 5,376 26.8  
1969–83 6,168 29.1 85 41.1 263 28.7 5,820 29.0  
1984–98 5,089 24.1 59 28.5 290 31.7 4,740 23.7  
1999–13 4,408 20.8 50 24.2 256 28.0 4,102 20.5  < 0.001
Stage (FIGO)          
1 11,322 53.5 180 87.0 754 82.4 10,388 51.8  
2 5,236 24.7 19 9.2 103 11.3 5,114 25.5  
3 2,775 13.1 3 1.4 33 3.6 2,739 13.7  
4 1,487 7.0 3 1.4 9 1.0 1,475 7.4  
Unknown 340 1.6 2 1.0 16 1.7 322 1.6  < 0.001
Morphology          
Squamous cell carcinoma 17,565 83.0 164 79.2 745 81.4 16,656 83.1  
Adenocarcinoma 2,284 10.8 26 12.6 104 11.4 2,154 10.7  
Adenosquamous carcinoma 374 1.8 6 2.9 34 3.7 334 1.7  
Other malignancies 880 4.2 10 4.8 28 3.1 842 4.2  
Unspecified morphology 57 0.3 1 0.5 4 0.4 52 0.3  < 0.001
Total 21,160 100.0 207 100.0 915 100.0 20,038 100.0  
Screening historyb          
No smear 3,371 60.3 24 38.7 119 36.8 3,228 62.0  
Only normal smears 1,445 25.9 25 40.3 119 36.8 1,301 25.0  
Abnormal smearsc 694 12.4 13 21.0 76 23.5 605 11.6  
Only unsatisfactory smears 78 1.4 0 0 9 2.8 69 1.3  < 0.001
Total 5,588 100.0 62 100.0 323 100.0 5,203 100.0  
  1. ap-values for difference: Chi-square tests between age groups
  2. bSmears taken from 3.5 years and up to six months prior to diagnosis, available from 1 July, 1995
  3. cCytology diagnosis of atypical squamous cells of undetermined significance or more severe