Table 1

Work status and clinical features at baseline*

Job status at baselineType of job at baseline
Total No (%)Not working No (%)In paid work No (%)Manual No (%)Semi-manual No (%)Semi-sedentary No (%)Sedentary No (%)
*Missing job details at baseline = 11.
Total721 (100)368 (51)353 (49) 81 (23)61 (17)82 (23)129 (37)
Sex
    Male249 (35)107 (29)142 (40)63 (78)26 (43)21 (26)32 (25)
    Female472 (65)261 (71)211 (60)18 (22)35 (57)61 (74)97 (75)
Age at onset
    <45180 (25)40 (11)140 (40)25 (31)27 (44)34 (41)54 (42)
    45–60296 (41)110 (30)186 (53)46 (57)32 (52)41 (50)67 (52)
    >60245 (34)218 (59)27 (7.6)10 (12)2 (3.3)7 (8.5)8 (6.2)
ACR criteria
    <4 ACR225 (31)117 (32)108 (31)24 (30)16 (26)24 (29)44 (34)
    ≥4 ACR496 (69)251 (68)245 (69)57 (70)45 (74)58 (71)85 (66)
RF
    Neg265 (37)141 (38)124 (36)27 (34)22 (36)24 (30)51 (40)
    Pos452 (63)227 (62)225 (64)53 (66)39 (64)56 (70)77 (60)
Radiographic erosions
    Absent530 (75)262 (73)268 (78)59 (74)43 (70)68 (86)98 (78)
    Present173 (25)96 (27)77 (22)21 (26)18 (30)11 (14)27 (22)
Functional grade
    I239 (33)108 (29)131 (37)36 (45)17 (28)31 (38)47 (36)
    II429 (60)223 (61)206 (59)39 (49)41 (67)46 (56)80 (62)
    III51 (7.1)36 (9.8)15 (4.3)5 (6.3)3 (4.9)5 (6.1)2 (1.6)