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Table 1 Participant Demographics for IMPACT at Baseline and Follow-up Measurement Periods, 2000–2002.

From: Increasing physical activity and decreasing sedentary activity in adolescent girls – The Incorporating More Physical Activity and Calcium in Teens (IMPACT) study

CHARACTERISTIC

BASELINE (Fall 2000)

FOLLOW-UP (Spring 2002)

 

Number

Percent

Number

Percent

TOTAL STUDENTS

718

 

606

 

Control

371

52%

315

52%

Intervention

347

48%

291

48%

ETHNICITY

Non-Hispanic White

515

72%

436

72%

Hispanic

83

12%

73

12%

African-American

39

5%

27

5%

Other

80

11%

69

11%

ONSET OF MENSES

140

20%

407

67%

 

Mean

SD

Mean

SD

AGE IN YEARS

11.6

± 0.4

13.2

± 0.4