Table 2 Reporting of cohort studies using RWD

R1.1a

Type of data

182(97.3)

5(2.7)

R1.1b

Name of databases

134(71.7)

2(1.1)

51(27.2)

R1.2a

Geographic region

117(62.6)

70(37.4)

R1.2b

Time frame

97(51.9)

90(48.1)

R1.3

Linkage between databases

33(50)

33(50)

121

Methods

R6.1

Population selection methods

75(40.1)

112(59.9)

R6.2

Validation of codes/algorithms for population selection

21(28)

54(72)

112

R6.3

Graphical display of data linkage process

12(18.2)

54(81.8)

121

R7.1a

Codes/algorithms of exposures

28(15)

2(1)

157(84)

R7.1b

Codes/algorithms of outcomes

43(23)

34(18.2)

11(5.9)

R7.1c

Codes/algorithms of confounders and effect modifiers

23(12.3)

7(3.7)

157(84)

R12.1

The extent of database accessed

153(81.8)

34(18.2)

R12.2

Data-cleaning methods

65(34.8)

122(65.2)

R12.3

Detail of data linkage

28(42.4)

28(42.4)

10(15.2)

121

Results

R13.1

Detail of population selection

107(57.2)

19(10.2)

61(32.6)

Discussion

R19.1a

Inherent limitations

155(82.9)

32(17.1)

R19.1b

Risk of misclassification

58(31)

129(69)

R19.1c

Limitations of codes/algorithms and the validation

19(25.3)

56(74.7)

112

R19.1d

Implications of the missing variables and missing data

118(63.1)

69(36.9)

R19.1e

Eligibility of results over time

34(18.2)

153(81.8)

Other information

R22.1a

Study protocol availability

44(23.5)

143(76.5)

R22.1b

Raw data availability

38(20.3)

149(79.7)

R22.1c

Supplementary materials availability

100(53.5)

87(46.5)