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    Children During Adolescence [10 - 16 Years]
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from 12.3 (Hyderabad) to 13.2 years (Varanasi), from 13.3 (Hyderabad and Vellore urban slum) to 14.1 years (Varanasi) and from 13.9 (Vellore urban slum) to 14.8 years (Jabalpur and Delhi urban slum) respectively (Table 34).

The mean weight of girls at reaching stage II, III, IV and V was between 24.8 (hyderabad) to 26.9 (Chandigarh), 28.5 (Hyderabad) to 32.0 (Chandigarh), 32.9 (Hyderabad) to 37.8 (Varanasi) and between 39.8 (vellore urban slum) to 44.0 (Varanasi) kg. respectively at different centres (Table 35). The mean height of girls at stage II, III, IV and V of breast development varied between 133.0 (Varanasi) to 136.2 cm. (Chandigarh), 139.3 (Hyderabad) to 143.7 cm. (Chandigarh), 145.0 (Hyderabad) to 148.3 cm. (Chandigarh) and between 150.0 (Vellore urban slum) to 155.5 cm. (Chandigarh) respectively (Table 36).

The average time taken from stage II to stage III, stage III to stage IV and from stage IV to stage V of breast development varied between 0.7 to 1.3, 0.7 to 1.1 and 0.4 to 1.2 years respectively. The gain in weight and height from stage II to III of breast development varied between 3.7 to 5.4 kg. and 5.6 to 8.5 cm., from stage III to stage IV 4.4 to 6.2 kg. and 4.6 to 6.9 cm. and from stage IV to stage V 3.6 to 7.1 kg. and 3.5 to 7.2 cm. respectively (Fig. 47, 48 &49).

SKELETAL MATURITY

It was felt that along with physical and sexual development in adolescents, skeletal maturity should also be investigated. But only three centres viz. AIIMS, Delhi; Medical College, Jabalpur and Christian Medical College, Vellore (urban) had adequate facilities and agreed to carry out this component of the study. In view of the facilities and expertise available, Vellore centre, on a request from the Council, coordinated this component of the study.

The means and standard deviations of skeletal maturity scores and bone ages considering gender and chronological age of the study children separately for each centre are shown in Tables 37 to 39 and percentile values of skeletal maturity scores for these centres are given in Tables 40 to 42.

As far as Vellore children are considered the boys lag behind by one year in Carpal bone maturity at each of the chronological ages considered, whereas this was limited to 6 months in Radius, Ulna and Short bone maturity. On the contrary, girls are one year ahead in their RUS (Radius, Ulna, Short) bone maturity compared to their chronological ages till 12.5 years, after which they level off. However, they lag six months behind in their carpal bone maturity till the age of 12 and reached total maturity by the age of 13 years. As the 20 bone maturity score takes into account,

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