Ventilation Weather And the Common Cold a Study of the Prevalence of Respirato
Ventilation Weather And the Common Cold a Study of the Prevalence of Respirato
George Truman Palmer
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12. 15. 9 15. 9 3. 6 3. 6 31. 31. 7. 7. 9. 9 9. 9 4. 2 4. 2 6. 6. 12. 12. 165 10. 4 10. 4 37. 0 36. 1 21. 21. 156. 119. 5. 7 5. 7 35. 0 38. 38. 82. 26. 4 26. 4 34 34. 48. 48. 34. 34. 12. 12. 34. 34. 1. 3 1. 3 11. 9 11. 99. 99. 196. 189. 10. 4 10. 4 10. 56. 56. 181. 8. 1 8. 1 5. 3 5. 3 33. 33. 154. 154. 1. 8 1. 8 151. 151. justed. Where the school influence is thus equalized in each ventilation type the average illness rates are appreciably different from the unconnected av- erages. In the compa...rison of Types A and B only those schools have been used which possessed both A and B rooms. A B room in a school not having TABLE XX COMPARATIVE RATES OF RESPIRATORY ILLNESS WITH UNCORRECTED AND BALANCED AVERAGES (BOTH STUDIES COMBINED) VENTILATION ABSENCE RATE ILLNESS IN ATTENDANCE RATE TYPE UNCORRECTED BALANCED UNCORRECTED BALANCED A 10. 0 9. 6 57 48 B 9. 0 9. 1 39 45 B 9. 4 9. 4 38 43 C 12. 0 11. 1 94 73 22 an A room is omitted. Similarly, in the comparisons of B and C rooms, B rooms are omitted where there is lacking a C room in the same school.
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