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Table 2 Characteristics of the study participants according to beverage consumption during adult life (ages 21 to 50 years)

From: Beer and wine consumption and risk of knee or hip osteoarthritis: a case control study

Exposure Control, number = 933 Knee OA, number = 1001 Hip OA, number = 993
Alcohol consumption (ages 21 to 50)    
Nondrinkersa, n (%) 186 (19.9) 280 (28.0) 257 (29.9)
Ever drinkersb, n (%) 747 (80.1) 721 (72.0) 736 (74.1)
By type of alcohol    
Drinkers of beer exclusively, n (%) 272 (29.1) 345 (34.5) 336 (33.8)
Drinkers of wine exclusively, n (%) 73 (7.8) 37 (3.7) 61 (6.1)
Drinkers of spirits exclusively, n (%) 33 (3.5) 38 (3.8) 29 (2.9)
Other drinkersc, n (%) 348 (37.3) 276 (27.6) 282 (28.4)
Missing data on alcohol type, n (%) 21 (2.3) 25 (2.5) 28 (2.8)
Alcoholic drinks per week, median (IQR) 10 (5 to 21) 11 (4 to 24) 10 (4 to 24)
Non-alcohol consumption d (ages 30 to 40)    
Tea intake (cups)    
never/3 times per month, n (%) 98 (10.5) 66 (6.6) 64 (6.5)
1 to 6 times per week, n (%) 48 (5.1) 51 (5.1) 38 (3.8)
≥1 per day, n (%) 775 (83.1) 876 (87.5) 877 (88.3)
Coffee intake (cups)    
never/3 times per month, n (%) 202 (21.7) 268 (26.8) 213 (21.5)
1 to 6 times per week, n (%) 152 (16.3) 174 (17.4) 174 (17.5)
≥1 per day, n (%) 567 (60.8) 551 (55.0) 592 (59.6)
Pure fruit juice (glasses)    
never/3 times per month, n (%) 511 (54.8) 586 (58.5) 579 (58.3)
1 to 6 times per week, n (%) 284 (30.4) 260 (26.0) 285 (28.7)
≥1 per day, n (%) 126 (13.5) 147 (14.7) 115 (11.6)
  1. aNondrinkers include never drinkers at ages 21 to 50 years. bEver drinkers drunk alcohol on a regular basis (at least 1 alcoholic drink per week) at ages 21 to 50 years. cdrinkers of a mixture of beer, wine, and / or spirits. dAnalyses are based on age period 30 to 40 years when information on non-alcoholic beverage consumption was assessed. The number per group and percentages, or median (interquartile range (IQR) are presented. n, number; OA, osteoarthritis.