Table 3 Odds ratios of higher level ordinal response due to unit change in SBD, sex or drug in the six most common side effects (95 % CI)

Tiredness

1.65 (1.26 to 2.18)***

2.10 (0.91 to 4.84)

0.76 (0.33 to 1.78)

Sleepiness

1.28 (0.96 to 1.69)

2.29 (0.84 to 6.25)

0.80 (0.30 to 2.17)

Memory Problems

1.58 (1.09 to 2.29)*

4.56 (1.03 to 20.27)*

1.55 (0.41 to 5.85)

Disturbed sleep

1.62 (1.07 to 2.44)*

4.31 (0.87 to 21.40)

4.52 (1.01 to 20.25)*

Difficulty concentrating

1.53 (1.13 to 2.08)**

2.35 (0.80 to 6.88)

3.15 (1.06 to 9.32)*

Unsteadiness

1.71 (1.20 to 2.44)**

6.12 (1.60 to 23.46)**

1.09 (0.32 to 3.76)