[Report 1954] / Medical Officer of Health, Leicester Borough.

  • Leicester (England). Borough Council.
Date:
1954
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1954] / Medical Officer of Health, Leicester Borough. Source: Wellcome Collection.

    113/234 (page 99)
    The means of the birthweights, as is shown in Table I, are 7.6± 0.084 (3.454±0.04 kg.) for boys and 7.2±0.08 (3.273±0.036 kg.) for girls, and the respective standard deviations: 1.1 lb. (0.5 kg.) and 0.98 lb. (0.445 kg.). There is a greater proportion of lower birthweight present in the female group of the infants. TABLE I Number, Sex and Birthiveight Frequency Distribution in 320 Infants Birth¬ weight lb. kg. 5- 2.270- 6- 2.730- 7- 3.180- 8- 3.636- 9- 4.090- 10 4.545-5 Total M. S.D. Boys 6 50 63 30 19 3 171 7.6 i 0.084 1.1 Girls 16 48 55 25 5 — 149 7.2±0.080 0.98 Total 22 98 118 55 24 3 320 7.4±0.059 1.06 For the whole group (Table II) there is a mean of DBT of 18.3 weeks or 128 days ; for the boys the mean is 17.98 weeks or 126 days, for the girls 18.7 weeks or 131 days. Sixty-five per cent of the whole series, 62 per cent of the boys and 68 per cent of the girls, double the birthweight between 14 and 22 weeks, i.e., 98 and 154 days ; only 7.5 TABLE II Frequency Distribution of Birthiveight Doubling Time in weeks and Cumulative Percentage Boys Girls Total Cumulative Cumulative Cumulative Weeks No. percentages No. percentages No. percentages 30-33 8 100.0 — — 8 100.0 26-29 8 95.3 8 100.0 16 97.5 22-25 16 90.6 22 94.6 38 92.5 18-21 50 81.3) 47 79.8) 97 80.6) 14-17 56 52.0/ 620//° 55 48.3] (58U/o 111 50.3/ 65 % 10-13 31 19.3 16 11.4 47 15.6 8 and 9 2 1.2 1 0.7 3 0.9 Total . . 171 Range . . 9-31 weeks Mean weeks 17.98±0.39 Days . . 126 S.D. . . 5.1 weeks 149 8-28 weeks 18. 7 ±0. 34 131 4.12 weeks 320 8-31 weeks 18. 3 ±0.26 weeks 128 4.66 weeks