"x"
"1" "              Table 2: Change in prevalence of antibody positivity to SARS-CoV-2 using LFIA test over three rounds from June to September"
"2" "                                  ROUND 1                              ROUND 2                               ROUND 3                                                  COMPARISONS"
"3" "Category                Total   Total  Prevalence R1        Total   Total  Prevalence R2        Total   Total   Prevalence R3 (weighted % difference R1/R2      % difference R2/R3     % difference R1/R3"
"4" "                    antibody     tests (weighted and    antibody     tests (weighted and    antibody     tests  and adjusted where"
"5" "                     positive   (with  adjusted where    positive   (with  adjusted where    positive   (with   appropriate)"
"6" "                                 valid appropriate)                  valid appropriate)                  valid"
"7" "                              results)                            results)                            results)"
"8" "Full cohort**"
"9" "England                 5544   99908   5.96 [5.78-6.14]     4995  105829   4.83 [4.67-5.00]     7037  159367    4.38 [4.25-4.51]        -18.96 [-21.81, -16.11] -9.11 [-12.01, -6.21]  -26.34 [-28.86, -23.83]"
"10" "Sex**"
"11" "Male                    2405   43825   6.17 [5.91-6.44]     2117   46269   4.87 [4.64-5.11]     3029   69421    4.37 [4.19-4.56]        -21.07 [-24.96, -17.18] -10.27 [-14.58, -5.95] -29.17 [-32.74, -25.61]"
"12" "Female                  3139   56083   5.75 [5.50-6.01]     2878   59560   4.79 [4.57-5.03]     4008   89944    4.39 [4.21-4.57]        -16.70 [-20.87, -12.52] -8.56 [-12.73, -4.38]  -23.83 [-27.48, -20.17]"
"13" "Age**"
"14" "18-24                    463    6499   7.86 [7.26-8.50]      411    6493   7.31 [6.75-7.90]      574    8763    6.70 [6.25-7.17]        -7.12 [-14.50, 0.25]    -8.34 [-15.32, -1.37]  -14.89 [-21.63, -8.14]"
"15" "25-34                    930   13366   7.83 [7.35-8.32]      775   13573   5.88 [5.47-6.32]     1036   20212    5.15 [4.83-5.49]        -24.90 [-30.52, -19.28] -12.24 [-18.54, -5.95] -34.10 [-39.21, -28.99]"
"16" "35-44                    964   17052   6.09 [5.65-6.56]      837   17130   5.12 [4.71-5.55]     1202   26687    4.60 [4.28-4.94]        -16.09 [-23.15, -9.03]  -10.16 [-17.38, -2.93] -24.63 [-31.03, -18.23]"
"17" "45-54                   1255   20634   6.41 [5.98-6.87]     1100   21487   5.48 [5.08-5.90]     1559   32403    4.96 [4.65-5.29]        -14.51 [-21.06, -7.96]  -9.49 [-16.06, -2.92]  -22.62 [-28.55, -16.69]"
"18" "55-64                   1131   20404   5.92 [5.46-6.40]     1074   21840   4.70 [4.30-5.14]     1537   32870    4.33 [4.01-4.67]        -20.61 [-27.87, -13.34] -7.66 [-15.53, 0.21]   -26.69 [-33.45, -19.93]"
"19" "65-74                    568   15543   3.16 [2.76-3.59]      594   17617   2.74 [2.37-3.14]      787   26542    2.25 [1.96-2.56]        -13.61 [-25.95, -1.27]  -17.52 [-29.93, -5.11] -28.80 [-39.87, -17.72]"
"20" "75+                      233    6410   3.31 [2.86-3.79]      204    7689   1.61 [1.26-2.00]      342   11890    2.01 [1.70-2.34]        -51.06 [-63.44, -38.67] 24.84 [3.73, 45.96]    -38.97 [-50.76, -27.19]"
"21" "Region**"
"22" "North East               196    3574   5.03 [4.30-5.85]      202    4027   4.34 [3.66-5.10]      296    6327    3.87 [3.33-4.46]        -13.92 [-28.43, 0.60]   -10.83 [-25.35, 3.69]  -23.26 [-36.38, -10.14]"
"23" "North West               714   11996   6.65 [6.14-7.19]      657   12995   5.25 [4.80-5.74]      910   18616    4.50 [4.15-4.87]        -21.05 [-28.42, -13.68] -14.10 [-21.90, -6.29] -32.18 [-38.80, -25.56]"
"24" "Yorkshire and The        284    6519   3.95 [3.46-4.48]      306    7391   3.97 [3.50-4.49]      399   10594    3.37 [3.01-3.77]        0.76 [-11.65, 13.16]    -15.37 [-26.20, -4.53] -14.68 [-25.82, -3.54]"
"25" "Humber"
"26" "East Midlands            601   12684   4.23 [3.71-4.80]      533   13685   3.37 [2.90-3.89]      756   20469    3.11 [2.73-3.52]        -20.33 [-32.39, -8.27]  -7.72 [-20.77, 5.34]   -26.48 [-37.35, -15.60]"
"27" "                                                                                                                                                                                                 9"