Table 2 Baseline characteristics of students participating in the Healthy High School study by intervention group. Values are percentages (numbers) unless stated otherwise
|  | Imputed casesa (N = 4755) | |
|---|---|---|
Characteristics of students | Intervention (n = 2222) | Control (n = 2355) |
Girls | 61.8 (1372) | 64.1 (1541) |
Age (years), mean (SD) | 16.2 (0.9) | 16.3 (1.2) |
Parental Occupational Social Class | ||
High social class (I + II) | 47.6 (1057) | 47.0 (1106) |
Middle social class (III + IV) | 34.0 (755) | 34.0 (801) |
Low social class (V) | 12.9 (286) | 12.9 (303) |
Unclassifiableb | 5.6 (124) | 6.2 (145) |
Breakfast frequency | ||
Daily intake Monday-Sunday | 54.6 (1214) | 54.0 (1272) |
Daily intake Monday-Friday | 67.9 (1508) | 66.4 (1563) |
Daily intake Saturday-Sunday | 74.3 (1650) | 75.9 (1787) |
Lunch frequency | ||
Daily intake Monday-Sunday | 49.9 (1109) | 51.7 (1218) |
Daily intake Monday-Friday | 74.2 (1649) | 76.3 (1796) |
Daily intake Saturday-Sunday | 63.5 (1411) | 62.2 (1464) |
Daily intake of minimum 1 lc of water | 69.8 (1550) | 67.8 (1597) |
Intake of fresh fruit at least twice a day | 15.9 (353) | 13.9 (328) |
Intake of vegetables at least twice a day | 15.5 (344) | 14.3 (336) |