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. 2011 Jul 1;34(7):965–973. doi: 10.5665/SLEEP.1138

Table 2.

Profile of incident insomnia

Total, N Insomnia, n Incidence insomnia % (95% CI) Relative Risk (95% CI) Relative Risk P-value
Symptoms
    Total 701 180 25.68 (22.91-28.66)
    Male 312 66 21.15 (18.05-24.63) 1 -
    Female 389 114 29.31 (25.16-33.83) 1.44 (1.10-1.88) 0.008
Age Group
    65-69 136 30 22.06 (16.95-28.19) 1 -
    70-74 199 49 24.62 (18.77-31.6) 1.14 (0.77-1.70) 0.505
    75-79 152 46 30.26 (34.37-36.89) 1.47 (0.99-2.19) 0.058
    80+ 214 55 25.70 (20.52-31.67) 1.17 (0.80-1.73) 0.419
Syndrome
    Total 1255 100 7.97 (6.60-9.60)
    Male 712 31 5.71 (4.02-8.05) 1 -
    Female 543 69 9.69 (7.31-11.96 1.69 (1.12-2.57) 0.013
Age Group
    65-69 217 17 7.83 (4.61-13.01) - -
    70-74 347 25 7.21 (4.84-10.59) 0.97 (0.54-1.76) 0.925
    75-79 258 20 7.75 (5.03-11.77) 1.09 (0.58-2.03) 0.792
    80+ 433 38 8.78 (6.49-11.77) 1.13 (0.66-1.96) 0.654