Table 1.

HRs for a diagnosis of CIN3+ according to smoking among high-risk HPV-positive women (n = 1,353)

Cases/non-casesHRHRaHRb95% CI
Smoking
Never71/409111
Ever170/7011.361.301.321.00–1.76
 Smoking statusc
  Former46/2311.141.121.200.83–1.74
  Current124/4701.471.391.391.03–1.87
 Smoking duration,c y
  ≤422/1061.201.191.250.77–2.01
  5–969/3051.271.241.250.89–1.74
  ≥1079/2901.521.401.451.04–2.02
 Smoking intensityc
  1–9 cigarettes/d38/1871.161.121.150.78–1.71
  10–19 cigarettes/d74/3011.371.311.330.96–1.85
  ≥20 cigarettes/d58/2111.551.461.511.06–2.16
 Smoking initiationc
  ≤14 y old45/2031.281.141.130.77–1.68
  15–18 y old99/3601.501.441.471.08–2.00
  ≥19 y old26/1371.121.111.170.75–1.84
Age at baseline, y
22–2467/338111
25–2780/3691.101.081.100.80–1.53
28–3294/4041.171.071.110.80–1.54
HPV type at baseline
Non-HPV16 high-risk138/89911
HPV16103/2132.682.70

NOTE: Bold value indicates CI does not include 1.

  • aAdjusted for ever given birth and length of schooling.

  • bAdjusted for ever given birth, length of schooling, and HPV type.

  • cNever smoking is the reference category.