Table 5.

Comparison of anaerobes and prostate/cervix ca risk and imprecise measures of sun exposure vs more precise lung ca risk of low dose tobacco.

	No of studies	Actual or Median level of risk
Geographic study of PC risk low vs high sun exposure55	8	1.36 (range 1.01–1.73)
Clinical Questionnaire PC risk low vs high sun exposure55	8	1.13 (range 1.0–1.41)
Bacterial vaginosis & Ca Cervix56	19	1.51 (1.24–1.83)
HPV, BV and abnormal cytology vs BV alone vs BV absent57	1	3.82 vs 2.91 vs 1.00
10 yr cancer mortality post a psychiatric sick note vs no note in civil service58	1	2.49 (1.33 to 4.68)
Male death Lung cancer from smoking 1–4 cigarettes a day59	1	2.79 ((0.94 to 8.28)
Presence of anaerobes in prostate & PC risk see Table 4 for actual data	1	Odds ratio* (95% C.I.) = 17.8 (7. 6, 42.0); p-value= 3.88e-10 * Odds ratio was computed by median-unbiased estimation (exact CI).
Male death Lung cancer from smoking 5–9 cigarettes a day59	1	11.1 (6.94–20.44)