Table 3

 Risk factors and adjusted odds ratios for knee chondrocalcinosis, osteoarthritis, and pyrophosphate arthropathy

Sibling of PA (present/absent)Age (per 10 year increase)Sex (Female/male)BMI (kg/m2) (WHO criterion†)Knee pain (present/absent)CC (present/absent)OA (present/absent)
CC, chondrocalcinosis; OA, osteoarthritis; PA, pyrophosphate arthropathy; N/A, not appropriate.
*p⩽0.05; **p⩽0.01.
†WHO criteria for BMI: normal (<25 kg/m2), overweight (25–29.99 kg/m2), and obese (⩾30 kg/m2).
All CC1.16 (0.58 to 2.29)2.25 (1.79 to 2.82)**0.76 (0.52 to 1.10)0.90 (0.70 to 1.14)1.76 (1.15 to 2.69)**N/A1.71 (1.15 to 2.55)**
Isolated CC1.07 (0.41 to 2.78)1.87 (1.41 to 2.48)**0.92 (0.55 to 1.52)0.87 (0.63 to 1.20)1.35 (0.80 to 2.30)N/AN/A
All OA2.17 (1.35 to 3.48)**2.15 (1.83 to 2.45)**0.96 (0.76 to 1.21)1.48 (1.27 to 1.71)**3.74 (2.89 to 4.83)**1.70 (1.14 to 2.53)**N/A
Isolated OA1.74 (1.10 to 2.76)*1.85 (1.63 to 2.10)**1.02 (0.81 to 1.29)1.48 (1.28 to 1.72)**3.27 (2.52 to 4.24)**N/AN/A
PA1.09 (0.44 to 2.68)2.88 (2.10 to 3.93)**0.64 (0.38 to 1.06)1.01 (0.72 to 1.41)2.97 (1.68 to 5.43)N/AN/A