Fig. 4
From: Sex differences in the consumption of over-the-counter analgesics among amateur volleyball players
Probability of the use of OTC analgesics in amateur female players. The probability is given as a function of the scale hope of success and the years of playing practise. The x-axis shows the score hope of success, the y-axis shows the years of playing practise of the player, and the z-axis indicate the probability of taking OTC analgesics. The grid represents the logistic regression function given by the parameter hope of success = − 0.0867 and years of playing practise = 0.0697 (for details see text), the probability is colour coded (scale on the right side). Red diamond: data of female OTC analgesic users, blue diamond: data of female non-users