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No. Name of Lifestyle Third Class Second Class First Class Type No. of Studies
1Age of growth spurtGrowth spurtPuberty Physiological characteristics No statistical significance factor1
2Puberty onsetPuberty onsetPuberty Physiological characteristics No statistical significance factor1
3Timing of reaching puberty groupNAPuberty Physiological characteristics Protective factor
No statistical significance factor
1
4Timing of voice breakNAPuberty Physiological characteristics No statistical significance factor1