London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
London County Council 1956
[Report of the Medical Officer of Health for London County Council]
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T able III—
| Recording station | Winter 1954-55 (a) | Summer 1955 (b) | Winter 1955-56 (a) | Summer 1956 (b) | Two-yearly | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Smoke | SO2 | Smoke | SO2 | Smoke | SO2 | Smoke | SO2 | Smoke | SO2 | |
| n.w. ambulance station, Hampstead | 48(c) | 9.6(c) | 13 | 3.4 | 54 | 10.7 | 17 | 4.0 | 33 | 7.1 |
| Eastern ambulance station, Hackney | 56(c) | 8.6(c) | 14 | 3.8 | 60 | 11.5 | 16 | 4.2 | 37 | 7.1 |
| Brook ambulancc station, Greenwich | 37 (d) | 7.7(d) | 13 | 3.3 | 39 | 8.3 | 10 | 3.2 | 25 | 5.6 |
| S.E. ambulancc station, Deptford.. | 52(c) | 10.1(c) | 17 | 5.5 | 62 | 11.2 | 17 | 5.3 | 37 | 8.0 |
| S.w. ambulance station, Lambeth | 62(d) | 13.6(d) | 18 | 5.0 | 61 | 12.5 | 16 | 4.7 | 39 | 9.0 |
| Western ambulance station, Chelsea | 55(c) | 15.6(e) | 20 | 7.5 | 53 | 15.7 | 18 | 6.5 | 37 | 11.3 |
| County Hall, Lambeth | 31 | 12.6 | 11 | 6.2 | 34 | 13.0 | 11 | 5.8 | 21 | 9.4 |
(a) Winter = months of October—March inclusive.
(b) Summer = months of April—September inclusive.
(c) Commenced recording November, 1954, and mean is for five months.
(d) Commenced recording December, 1954, and mean is for four months.
(e) Commenced recording mid-November, 1954, and mean is for four and one half months.
Six monthly means are means of monthly averages which in turn are means of the daily average figures and the two-yearly
means are the means of the four seasonal averages.
To assess whether there is any association between mortality and the various indices
tabulated, the correlation coefficients of the several variables were calculated and the
results are shown for the first eight areas listed in Table V. Clapham and Brixton
and Chelsea were omitted because of the presence of several non-transferable institutions
within these areas. In such institutions according to the Registrar General's rules of
1953-4 (see his Statistical Review for 1953), deaths are not transferable to the former
place of residence and this results in completely unrepresentative death rates and ratios
(for a detailed account of this effect see Hewitt 1957). The problem of non-transferable
deaths also exists in the borough of Deptford but since this borough is joined with the
Peckham Division of Camberwell the effect is less serious. On the basis of the six months
October 1956—March 1957, which were somewhat unrepresentative because of the
very low mortality in this mild winter, deaths in these institutions in Deptford amounted
in total to about 13 per cent, of deaths for the joint Deptford/Peckham area. In Chelsea
and in the joint Clapham and Brixton area the corresponding estimates were 38 and 19 per
cent, respectively, so high as to invalidate the calculation of rates or ratios based on
population.