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. 2010 May 25;7(5):e1000273. doi: 10.1371/journal.pmed.1000273

Table 3. Reliability by area of development for final items in MDAT.

Domain of Development Reliability Kappa Score Percentage Agreement
Excellent, >0.75 Fair to Good, 0.4–0.75 Poor, <0.4 >95% 85%–95% <85%
Gross motor (34) Interobserver immediate 34 (100%) 0 0 34 (100%) 0 0
Interobserver delayed 34 (100%) 0 0 30 (88%) 4 (12%) 0
Intra-observer delayed 27 (79%) 7 (21%) 0 12 (35%) 22 (65%) 1(3%)
Fine motor (34) Interobserver immediate 34 (100%) 0 0 34 (100%) 0 0
Interobserver delayed 30 (88%) 4 (12%) 0 27 (79%) 7 (21%) 0
Intra-observer delayed 23 (68%) 11 (32%) 0 7(20.6%) 25 (74%) 2(6%)
Language (34) Interobserver immediate 32 (94%) 0 2 (6%) 32 (94%) 2 (6%) 0
Interobserver delayed 26(76%) 8 (24%) 0 6 (18%) 26 (76%) 2(6%)
Intra-observer delayed 30 (88%) 4 (12%) 0 25 (74%) 8 (24%) 1(3%)
Social (34) Interobserver immediate 34 (100%) 0 0 25 (74%) 9 (26%) 0
Interobserver delayed 31 (91%) 3 (9%) 0 28 (82%) 5 (15%) 1(3%)
Intra-observer delayed 16(47%) 18 (53%) 0 7(21%) 21(62%) 5(15%)
Totals (136) Interobserver immediate 134 (99%) 0 2 (1%) 125 (92%) 11 (8%) 0
Interobserver delayed 121 (89%) 15 (11%) 0 91(67%) 42(31%) 3(2%)
Intra-observer delayed 96 (71%) 38(29%) 0 51(38%) 76 (56%) 9(6%)