Table 1

Distribution of cases and controls

Age at inclusion in study (years)

Age used for exposure analysis (years)



Gender

n

Mean

Standard deviation

Mean

Standard deviation


Cases

Female

438

62.0

9.6

59.6

9.8

Male

301

60.0

11.1

57.1

11.2

Controls

Female

303

57.8

11.8

54.8

11.8

Male

268

53.9

12.7

50.9

12.7


Klussmann et al. Arthritis Research & Therapy 2010 12:R88   doi:10.1186/ar3015

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