Table 4 Changes in average physical activity bout lengths and frequency between the Winter school term (2012) and subsequent school terms (95 % CI)

Whole sample

Winter

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Spring

1.4 (0.6 to 2.2)**

0.8 (0.4 to 1.3)**

−1.1 (−1.8 to −0.5)**

−0.7 (−1.1 to −0.4)**

−1.5 (−5.3 to 2.4)

−1.0 (−3.2 to 1.1)

−2.8 (−6.2 to 0.6)

−1.8 (−3.7 to 0.2)~

Summer

0.6 (−0.3 to 1.5)

0.2 (−0.3 to 0.7)

−2.0 (−2.7 to −1.2)**

−1.3 (−1.7 to −0.9)**

−0.4 (−2.5 to 1.9)

−0.7 (−1.8 to 0.5)

−0.5 (−2.2 to 1.3)

−0.4 (−1.4 to 0.6)

Autumn

1.4 (0.4 to 2.4)*

0.6 (0.1 to 1.1)*

−0.3 (−1.2 to 0.6)

−0.1 (−0.6 to 0.4)

2.5 (0.4 to 4.5)**

1.3 (0.2 to 2.4)*

1.8 (0.1 to 3.6)*

1.2 (0.2 to 2.2)*

Boys

Winter

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Spring

1.2 (−0.1 to 2.5)~

0.8 (0.1 to 1.6)*

−1.2 (−2.4 to −0.1)*

−0.7 (−1.3 to −0.1)*

0.8 (−5.5 to 7.0)

0.7 (−3.0 to 4.4)

−2.6 (−9.0 to 3.7)

−0.9 (−4.4 to 2.6)

Summer

0.3 (−1.2 to 1.7)

0.1 (−0.8 to 0.9)

−2.5 (−3.9 to −1.1)**

−1.5 (−2.3 to −0.8)**

−0.6 (−4.1 to 2.9)

−0.3 (−2.4 to 1.7)

−1.3(−4.7 to 2.0)

−0.4 (−2.2 to 1.4)

Autumn

0.2 (−1.4 to 1.8)

0.2 (−0.8 to 1.1)

−0.2 (−1.8 to 1.4)

0.1 (−0.9 to 0.9)

−0.5 (−3.9 to 2.8)

−0.1 (−2.0 to 1.8)

1.5 (−1.8 to 4.8)

0.9 (−0.9 to 2.8)

Girls

Winter

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Ref

Spring

1.5 (0.6 to 2.5)**

0.8 (0.3 to 1.3)**

−0.9 (−1.6 to −0.2)*

−0.7 (−1.1 to −2.7)**

−2.8 (−7.4 to 1.6)

−2.1 (−4.6 to 0.3)~

−3.4 (−6.7 to −0.1)*

−2.6 (−4.6 to −0.6)*

Summer

0.8 (−0.3 to 1.9)

0.2 (−0.4 to 0.8)

−1.5 (−2.3 to −0.7)**

−1.1 (−1.6 to −0.6)**

−0.3 (−2.8 to 2.2)

−0.9 (−2.2 to 0.4)

−0.4 (−2.2 to 1.3)

−0.7 (−1.8 to 0.3)

Autumn

2.3 (1.1 to 3.5)**

0.9 (0.2 to 1.5)**

−0.3 (−1.2 to 0.5)

−0.2 (−0.8 to 0.3)

5.0 (2.6 to 7.3)**

2.4 (1.1 to 3.6)**

2.2 (0.5 to 4.0)*

1.4 (0.4 to 2.5)*