Table 2

 Current and past medical conditions by intervention group

Intervention groupp value
A (n = 122)B (n = 125)C (n = 115)
n%n%n%
FE, Fisher’s exact test.
History hand/arm disorder past 3 years (medication and/or intensity ⩾6)
    No99(82.5)101(82.8)87(77.7)0.54
    Yes21(17.5)21(17.2)25(22.3)
    Missing233
History neck/shoulder disorder past 3 years (medication and/or intensity ⩾6)
    No79(65.8)81(66.4)65(58.0)0.34
    Yes41(34.2)41(33.6)47(42.0)
    Missing233
Neck/shoulder symptomatic at time of entry
    No114(93.4)116(92.8)109(94.8)0.82
    Yes8(6.6)9(7.2)6(5.2)
Hand/arm symptomatic at time of entry
    No120(98.4)124(99.2)115(100.0)0.66 (FE)
    Yes2(1.6)1(0.8)0(0.0)
Symptomatic body part: screener
    N/S only8(6.6)9(7.2)6(5.2)0.78 (FE)
    H/A only2(1.6)1(0.8)0(0.0)
    Neither112(91.8)115(92.0)109(94.8)