Variable

Female

Male

Diff

(p-value)

N

Mean

Std. Dev.

N

Mean

Std. Dev.

Headache

137,090

2.32

0.84

133692

1.89

0.73

0.43***

Stomachache

136,267

2.09

0.81

132301

1.57

0.70

0.52***

Sleep problem

183,823

2.13

0.99

179779

1.82

0.90

0.30***

Unhappy, sad or depressed

183,487

2.13

1.02

179459

1.60

0.83

0.53***

Dissatisfied with self

160,161

2.11

0.83

154485

1.64

0.71

0.47***

Shirk school

205,960

1.53

0.98

205235

1.53

1.01

0.00

Binge drinking

169,070

1.70

1.16

165277

1.67

1.18

0.03***

Conflict with parents

138,931

3.02

0.88

139496

3.17

0.83

-0.16***

Bullied

205,982

5.35

1.12

204562

5.39

1.09

-0.04***

Coffee consumption

156,675

1.61

0.74

153384

1.38

0.67

0.23***

Sport achievement

202,684

2.42

0.89

200291

2.18

0.86

0.24***

Spare-time job

155,912

1.39

0.73

151860

1.38

0.74

0.01***

Academic achievement

203,396

2.48

0.78

201364

2.45

0.81

0.03***

Academic ambitions

200,691

0.71

0.45

193743

0.56

0.50

0.16***