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Table 1 Demographic characteristics by invasive disease status among 20,131 women seen November 2002 to June 2011

From: Most women diagnosed with cervical cancer by a visual screening program in Tanzania completed treatment: evidence from a retrospective cohort study

  No invasive cervical cancer Invasive cervical cancer  
  N/mean %/SD N/mean %/SD  
Total 19,151 95.1 980 4.9  
Occupation      
   Housewife 9,847 51.4% 755 77.0% p < 0.0001*
   Manual 727 3.8% 64 6.5%
   Technical 235 1.2% 2 0.2%
   Office going 2,126 11.1% 32 3.3%
   Teaching 1,332 7.0% 11 1.1%
   Professional 1,217 6.4% 3 0.3%
   Business 3,529 18.4% 100 10.2%
   Other 101 0.5% 9 0.9%
   Missing 37 0.2% 4 0.4%  
Education      
   None 1,723 9.0% 411 41.9% p < 0.0001*
   Primary 10,365 54.1% 481 49.1%
   Middle 4,524 23.6% 63 6.4%
   High School 628 3.3% 9 0.9%
   College 1,843 9.6% 9 0.9%
   Missing 68 0.4% 7 0.7%  
Marital status      
   Married/regular partner 15,551 81.2% 630 64.3% p < 0.0001*
   Widowed 1,368 7.1% 207 21.1%
   Separated 1,402 7.3% 131 13.4%
   Other 677 3.5% 6 0.6%
   Missing 153 0.8% 6 0.6%  
Last menstrual period      
   <12 months ago 15,962 83.3% 530 54.1% p < 0.0001*
   >12 months ago 3,060 16.0% 436 44.5%
   Missing 129 0.7% 14 1.4%  
Age 39.4 10.0 50.5 12.9 p < 0.0001**
   Missing 48   3   
Age at marriage 21.4 4.4 19.0 4.3 p < 0.0001**
   Missing 1,966   94   
Gravidity 3.8 2.7 6.3 3.2 p < 0.0001**
   Missing 731   15   
Year of screening      
   2002 549 2.9% 10 1.0% p < 0.0001*
   2003 4,681 24.4% 77 7.9%
   2004 2,465 12.9% 82 8.4%
   2005 1,570 8.2% 81 8.3%
   2006 1,089 5.7% 92 9.4%
   2007 1,610 8.4% 134 13.7%
   2008 1,698 8.9% 144 14.7%
   2009 2,258 11.8% 143 14.6%
   2010 2,363 12.3% 155 15.8%
   2011 866 4.5% 58 5.9%
   Missing 2 0.0% 4 0.4%  
  1. *Chi-squared test.
  2. **Mann-Whitney U test (t approximation).