Table 3

Individual circadian rhythm characteristics for pain rating, stiffness rating, and dexterity

Variable:
Pain ratingBest fittingStiffness ratingBest fittingDexterityBest fitting
Fitted period = 24.0 hCircadian periodFitted period=24.0 hCircadian periodFitted period=24.0 hCircadian period
Patient/ sexNp ValueMA(%A)bØ (h)Hoursp Valuep ValueMA(%A)bØ (h)Hoursp Valuep ValueMA(%A)bØ (h)Hoursp Value
    Data obtained by self measurement every 2–4 h during waking only for 10 days. Any series with a significant trend had the trend removed before analysis for circadian rhythm by the least squares fit of a 24.0 h cosine. Each series was also analysed for best fitting cosine in the circadian domain between 14 and 34 h.
For rhythm characteristics: p value from zero amplitude test; M=mesor (middle value of fitted cosine); A=amplitude (distance from M to peak or trough of cosine); %A=% amplitude (A as % of M); bØ=bathyphase (lowest point of fitted cosine, referenced from 00:00h).
1F600.15014.25.1(36)15:4223.90.147<0.00118.914.0(74)15:4424.1<0.001<0.00170.26.5(9)15:3623.7<0.001
3F49<0.00167.77.8(12)07:0823.8<0.001<0.00148.018.2(38)16:1424.2<0.001<0.00155.46.4(12)16:3723.8<0.001
4F600.0202.21.3(60)17:1824.30.0120.01512.64.2(34)17:5924.60.001<0.00167.38.2(12)15:5524.0<0.001
5F520.7862.30.1(5)05:1222.30.0490.0415.01.1(21)15:5024.50.0120.02264.34.2(7)15:0224.7<0.001
6F440.03521.27.7(36)13:1024.10.0350.00538.717.6(45)15:4223.4<0.0010.259113.813.0(11)14:4923.70.224
7F600.2143.50.9(27)12:4423.20.0570.32771.31.0(1)17:5220.90.1120.32370.82.7(4)17:0321.60.045
8F590.1916.00.4(7)12:0223.00.1240.7218.00.2(3)10:3826.80.330<0.00147.11.7(4)09:3023.5<0.001
9F460.00761.76.2(10)17:0223.80.0050.12679.64.4(6)14:4624.70.017<0.00164.37.7(12)16:0524.0<0.001
10F600.1389.12.7(30)16:5123.60.1000.04217.95.2(29)14:4822.80.003<0.00195.210.4(11)15:0423.8<0.001
11F60<0.00148.815.8(32)20:3224.2<0.001<0.00140.010.7(27)18:4824.2<0.001<0.00175.310.2(14)17:1524.3<0.001
15F48<0.00140.613.6(34)18:3423.9<0.0010.01150.013.2(26)18:2625.2<0.001<0.00157.97.3(13)17:2224.1<0.001
16F580.36736.11.9(5)01:5321.80.0130.10277.71.8(2)14:0222.40.011
17F560.30313.72.2(16)22:4424.60.2520.21912.32.4(19)23:3324.80.1100.08871.92.3(3)09:3823.60.069
18F430.05052.08.1(15)13:3023.60.023<0.00143.013.5(31)13:3324.1<0.0010.002102.017.8(17)14:5424.10.002
19F500.20011.02.7(24)10:1523.20.1280.00617.55.7(32)14:1923.70.0020.09581.67.0(9)15:0223.20.005
20F520.00271.17.8(11)10:1424.5<0.0010.00572.76.3(9)11:5624.6<0.0010.042103.65.9(6)11:2223.30.030
21F60<0.00166.216.6(25)18:0123.8<0.001<0.00160.314.1(23)17:3923.7<0.001<0.00176.411.6(15)17:4624.0<0.001
2M600.02245.84.0(9)20:4223.40.0140.21552.14.4(8)16:2423.80.2000.15982.74.7(6)15:1623.10.050
12M600.02049.23.1(6)18:1023.70.017<0.00159.810.0(17)16:2723.9<0.001<0.00173.48.1(11)16:1823.8<0.001
13M600.08827.24.4(16)14:4624.80.0020.03430.05.2(17)14:4324.8<0.0010.16267.72.6(4)14:3926.90.059
22M550.7905.60.7(12)07:3232.30.0230.04913.84.3(31)19:2723.50.022<0.00176.47.1(9)17:2823.8<0.001