
Chris Busby
I am an independent researcher in the area of public health focusing on ionizing radiation (particularly internal exposures), radioactivity in the environment, and many other dangers to human health. I was the Green Party speaker on Technology and Science for many years. I am a chemical physicist, biologist and epidemiologist and have published in a wide range of areas, including cell biology and living systems.
Phone: +371 29419511, +44 7989428833
Address: Environmental Research SIA,
1117 Latvian Academy of Sciences
Akademi Laukas
Riga LV-1050
Latvia
Phone: +371 29419511, +44 7989428833
Address: Environmental Research SIA,
1117 Latvian Academy of Sciences
Akademi Laukas
Riga LV-1050
Latvia
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Papers by Chris Busby
improved diagnostic testing is widely held. In the United Kingdom the proportion of people aged 50 and over has increased by 45% since 1951 and
this proportion is set to increase by a further 36% by the year 2031, so the United Kingdom does indeed have an expanding ageing population.
However, the increase in cancer incidence affects people across the whole age spectrum. To test the hypothesis that the age of onset of cancer
(overall and specific) in England and Wales is decreasing over time we have developed The Cancer Incidence Temporality Index (CITI), which
gives a crude measurement of the portion of the population, in which cancer incidence is rising fastest over time: I ¼ (POa/PEa)/(POa/PEa),
where I is the CITI value, O is the observed number of cases and E is the expected number of cases; ‘a’ and ‘b’ refer to separate summation ranges
for younger and older age groups. Population data and cancer incidence data in England andWales, 1971e1999 were obtained from the UK Office
for National Statistics. The trends in CITI values have been shown graphically for cancer overall and for specific tumour sites. The impact of
diagnostic testing is also addressed. The results of this study suggest that the average age of onset of prostate, breast and cervical cancer is temporally
decreasing. The study also suggests that for cancer overall the trend for the age of onset of cancer in males has stabilised since 1990 and has
started to reverse in females from 1995 despite the expanding ageing population. A similar trend is observed for leukaemias. The CITI analysis for
colon cancer shows that the age of onset in both males and females is increasing over time. The trend for ovarian cancer is similar to that for colon
cancer. The CITI analysis for NHL in males is similar to that for colon cancer, however, in females the trend stabilised after 1990. The CITI may
aid prediction of changes in the age of onset of cancer and thus aid targeted aetiological research. In addition, we suggest the need for a mathematical
model, which may measure the changes in the age of onset of cancer in units of time.
improved diagnostic testing is widely held. In the United Kingdom the proportion of people aged 50 and over has increased by 45% since 1951 and
this proportion is set to increase by a further 36% by the year 2031, so the United Kingdom does indeed have an expanding ageing population.
However, the increase in cancer incidence affects people across the whole age spectrum. To test the hypothesis that the age of onset of cancer
(overall and specific) in England and Wales is decreasing over time we have developed The Cancer Incidence Temporality Index (CITI), which
gives a crude measurement of the portion of the population, in which cancer incidence is rising fastest over time: I ¼ (POa/PEa)/(POa/PEa),
where I is the CITI value, O is the observed number of cases and E is the expected number of cases; ‘a’ and ‘b’ refer to separate summation ranges
for younger and older age groups. Population data and cancer incidence data in England andWales, 1971e1999 were obtained from the UK Office
for National Statistics. The trends in CITI values have been shown graphically for cancer overall and for specific tumour sites. The impact of
diagnostic testing is also addressed. The results of this study suggest that the average age of onset of prostate, breast and cervical cancer is temporally
decreasing. The study also suggests that for cancer overall the trend for the age of onset of cancer in males has stabilised since 1990 and has
started to reverse in females from 1995 despite the expanding ageing population. A similar trend is observed for leukaemias. The CITI analysis for
colon cancer shows that the age of onset in both males and females is increasing over time. The trend for ovarian cancer is similar to that for colon
cancer. The CITI analysis for NHL in males is similar to that for colon cancer, however, in females the trend stabilised after 1990. The CITI may
aid prediction of changes in the age of onset of cancer and thus aid targeted aetiological research. In addition, we suggest the need for a mathematical
model, which may measure the changes in the age of onset of cancer in units of time.